I was trying to enable GPU optimized apps so I removed BOINC, re-booted and re-installed BOINC 7.0.64 and disabled the service install. After doing that when I try to launch BOINCmgr after installing without a service, the BOINCmgr GUI gets stuck in "connecting to localhost" for a long period and after a few minutes I get a popup window with
"BOINC Manager - Unexpected Exit
The BOINC Client has exited unexpectedly 3 times within the last 3 minutes. Would you like to restart it again?"

If I reinstall BOINC as a service the CPU apps work fine but it will not start the GPU applications. If I use BOINCmgr on the failing node to connect to a different node the GUI functions fine.

Any ideas what I might have done wrong on this node? I followed the same steps on 3 others and they are running the GPU apps fine. All are running Windows 7 SP1, BOINC 7.0.64, and the Lunatics installer v0.41.

stdoutqui.txt contains:
[06/08/13 17:38:00] TRACE [2140]: init_asynch() boinc_socket: 740
[06/08/13 17:38:00] TRACE [2140]: init_asynch() connect: -1
[06/08/13 17:38:00] TRACE [2140]: init_poll(): sock = 740
[06/08/13 17:38:00] TRACE [2140]: init_poll(): sock = 740
[06/08/13 17:38:00] TRACE [2140]: init_poll(): sock = 740
[06/08/13 17:38:00] TRACE [2140]: init_poll(): sock = 740
[06/08/13 17:38:01] TRACE [2140]: init_poll(): sock = 740
[06/08/13 17:38:01] TRACE [2140]: init_poll(): sock = 740
[06/08/13 17:38:01] TRACE [2140]: init_poll(): retrying connect: -1
[06/08/13 17:38:01] TRACE [2140]: init_poll(): sock = 740
[06/08/13 17:38:02] TRACE [2140]: init_poll(): sock = 740
[06/08/13 17:38:02] TRACE [2140]: init_poll(): sock = 740
[06/08/13 17:38:02] TRACE [2140]: init_poll(): sock = 740

stderrdae.txt contains:
ERROR: Invalid parameter detected in function (null). File: (null) Line: 0
ERROR: Expression: (null)


Unhandled Exception Detected...

- Unhandled Exception Record -
Reason: Breakpoint Encountered (0x80000003) at address 0x000007FEFD363C72

Engaging BOINC Windows Runtime Debugger...



********************


BOINC Windows Runtime Debugger Version 7.0.64


Dump Timestamp : 06/08/13 17:38:02
Loaded Library : dbghelp.dll
Loaded Library : symsrv.dll
Loaded Library : srcsrv.dll
Loaded Library : version.dll
Another instance of BOINC is running.
GLE: Another instance of BOINC is running.
GLE: Another instance
Debugger Engine : 4.0.5.0
Symbol Search Path: C:\ProgramData\BOINC;C:\Program Files\BOINC;srv*C:\ProgramData\BOINC\symbols*http://msdl.microsoft.com/download/symbols;srv*C:\ProgramData\BOINC\symbols*http://boinc.berkeley.edu/symstore

.
.
DLL info removed
.
.

*** Dump of the Process Statistics: ***

- I/O Operations Counters -
Read: 0, Write: 0, Other 0

- I/O Transfers Counters -
Read: 0, Write: 0, Other 0

- Paged Pool Usage -
QuotaPagedPoolUsage: 0, QuotaPeakPagedPoolUsage: 0
QuotaNonPagedPoolUsage: 0, QuotaPeakNonPagedPoolUsage: 0

- Virtual Memory Usage -
VirtualSize: 0, PeakVirtualSize: 0

- Pagefile Usage -
PagefileUsage: 0, PeakPagefileUsage: 0

- Working Set Size -
WorkingSetSize: 0, PeakWorkingSetSize: 0, PageFaultCount: 0

*** Dump of thread ID 5892 (state: Initialized): ***

- Information -
Status: Base Priority: Normal, Priority: Normal, , Kernel Time: 0.000000, User Time: 0.000000, Wait Time: 0.000000

- Unhandled Exception Record -
Reason: Breakpoint Encountered (0x80000003) at address 0x000007FEFDCB3C72

- Registers -
rax=000000000000001a rbx=0000000000000001 rcx=00000000716cc498 rdx=0000000000000002 rsi=0000000000000000 rdi=0000000040104f80
r8=0000000000000000 r9=0000000000000000 r10=0000000071610000 r11=0000000000000200 r12=000000000012fc48 r13=0000000000000001
r14=000000000012aae8 r15=0000000040114370 rip=00000000fdcb3c72 rsp=000000000012a468 rbp=000000000012ab60
cs=0033 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000206

- Callstack -
ChildEBP RetAddr Args to Child
0012a460 7161b1bd 00000001 0012ab60 00000000 00000000 KERNELBASE!DebugBreak+0x0
0012aa20 4004c6c6 00000001 400b9328 0012aa60 0012aa68 MSVCR80!_invalid_parameter_noinfo+0x0 (f:\dd\vctools\crt_bld\self_64_amd64\crt\src\invarg.c:100)
0012aa50 400538f7 00000000 00000001 00000000 00000000 boinc!std::vector<COPROC_ATI,std::allocator<COPROC_ATI> >::operator[]+0x0 (c:\program files (x86)\microsoft visual studio 8\vc\include\vector:762)
0012f8f0 4004e454 00000001 400f44c0 00000100 400e2bfc boinc!COPROCS::get_opencl+0xf (c:\src\boincgit\boinc_7.0b\client\gpu_opencl.cpp:318)
0012fbc0 4001a956 4009ec53 4009ec53 00000001 00868f25 boinc!COPROCS::get+0x12 (c:\src\boincgit\boinc_7.0b\client\gpu_detect.cpp:92)
0012fdd0 400648f2 00000003 00000003 00000001 0000005c boinc!CLIENT_STATE::init+0x0 (c:\src\boincgit\boinc_7.0b\client\client_state.cpp:386)
0012fe10 40064ca2 00000003 57b6c82f 00000000 00000000 boinc!boinc_main_loop+0x0 (c:\src\boincgit\boinc_7.0b\client\main.cpp:321)
0012ff20 400825b0 00130000 00000000 00130000 00000000 boinc!main+0x0 (c:\src\boincgit\boinc_7.0b\client\main.cpp:486)
0012ff50 76f9652d 00000000 00000000 00000000 00000000 boinc!__tmainCRTStartup+0x19 (f:\dd\vctools\crt_bld\self_64_amd64\crt\src\crtexe.c:597)
0012ff80 7752c521 00000000 00000000 00000000 00000000 kernel32!BaseThreadInitThunk+0x0 (f:\dd\vctools\crt_bld\self_64_amd64\crt\src\crtexe.c:597)
0012ffd0 00000000 00000000 00000000 00000000 00000000 ntdll!RtlUserThreadStart+0x0 (f:\dd\vctools\crt_bld\self_64_amd64\crt\src\crtexe.c:597)

*** Dump of thread ID 2992 (state: Initialized): ***

- Information -
Status: Base Priority: Normal, Priority: Normal, , Kernel Time: 0.000000, User Time: 0.000000, Wait Time: 0.000000

- Registers -
rax=00000000fffd9000 rbx=0000000000000000 rcx=0000000077483278 rdx=0000000000000001 rsi=0000000000000000 rdi=0000000000000000
r8=0000000077400000 r9=0000000000000000 r10=00000000fffb001c r11=00000000774931c8 r12=000000000262fed0 r13=0000000000000000
r14=0000000000000000 r15=0000000000000000 rip=0000000077419e6a rsp=000000000262fe38 rbp=0000000000000000
cs=0033 ss=002b ds=0000 es=0000 fs=0000 gs=0000 efl=00000246

- Callstack -
ChildEBP RetAddr Args to Child
0262fe30 7741615e 00000000 00000000 00000000 00000000 USER32!NtUserGetMessage+0x0
0262fe60 4007c3d9 00000000 00000000 00000000 00000000 USER32!GetMessageA+0x0
0262ff50 76f9652d 00000000 00000000 00000000 00000000 boinc!WindowsMonitorSystemPowerThread+0x1e (c:\src\boincgit\boinc_7.0b\client\sysmon_win.cpp:224)
0262ff80 7752c521 00000000 00000000 00000000 00000000 kernel32!BaseThreadInitThunk+0x0 (c:\src\boincgit\boinc_7.0b\client\sysmon_win.cpp:224)
0262ffd0 00000000 00000000 00000000 00000000 00000000 ntdll!RtlUserThreadStart+0x0 (c:\src\boincgit\boinc_7.0b\client\sysmon_win.cpp:224)

*** Dump of thread ID 2076 (state: Initialized): ***

- Information -
Status: Base Priority: Normal, Priority: Normal, , Kernel Time: 0.000000, User Time: 0.000000, Wait Time: 0.000000

- Registers -
rax=0000000000000000 rbx=0000000000000000 rcx=000000004007c990 rdx=0000000000000000 rsi=00000000000003e8 rdi=0000000000000000
r8=0000000000000000 r9=0000000000000000 r10=0000000000000000 r11=0000000000000000 r12=000000000272feb0 r13=0000000000000000
r14=0000000000000000 r15=0000000000000000 rip=000000007755165a rsp=000000000272fe88 rbp=0000000000000000
cs=0033 ss=002b ds=0000 es=0000 fs=0000 gs=0000 efl=00000246

- Callstack -
ChildEBP RetAddr Args to Child
0272fe80 fdc81203 0272ff48 00000000 00000000 00000000 ntdll!NtDelayExecution+0x0
0272ff20 4007c9ce 00000000 00000000 00000000 00000000 KERNELBASE!SleepEx+0x0
0272ff50 76f9652d 00000000 00000000 00000000 00000000 boinc!WindowsMonitorSystemProxyThread+0x0 (c:\src\boincgit\boinc_7.0b\client\sysmon_win.cpp:376)
0272ff80 7752c521 00000000 00000000 00000000 00000000 kernel32!BaseThreadInitThunk+0x0 (c:\src\boincgit\boinc_7.0b\client\sysmon_win.cpp:376)
0272ffd0 00000000 00000000 00000000 00000000 00000000 ntdll!RtlUserThreadStart+0x0 (c:\src\boincgit\boinc_7.0b\client\sysmon_win.cpp:376)

*** Dump of thread ID 5724 (state: Initialized): ***

- Information -
Status: Base Priority: Normal, Priority: Normal, , Kernel Time: 0.000000, User Time: 0.000000, Wait Time: 0.000000

- Registers -
rax=0000000000000000 rbx=0000000000000000 rcx=000000007751aec0 rdx=00000000003a2b20 rsi=0000000077604550 rdi=00000000003a2b20
r8=0000000000000000 r9=0000000000000000 r10=0000000000000000 r11=0000000000000000 r12=0000000077604500 r13=0000000000000000
r14=00000000776044e0 r15=0000000077604578 rip=00000000775518ca rsp=000000000308fcb8 rbp=0000000000000000
cs=0033 ss=002b ds=0000 es=0000 fs=0000 gs=0000 efl=00000293

- Callstack -
ChildEBP RetAddr Args to Child
0308fcb0 7751b007 00000000 00000101 00000000 77604550 ntdll!ZwWaitForMultipleObjects+0x0
0308ff50 76f9652d 00000000 00000000 00000000 13fd1eaa ntdll!TppWaiterpThread+0x0
0308ff80 7752c521 00000000 00000000 00000000 00000000 kernel32!BaseThreadInitThunk+0x0
0308ffd0 00000000 00000000 00000000 00000000 00000000 ntdll!RtlUserThreadStart+0x0


*** Debug Message Dump ****


*** Foreground Window Data ***
Window Name :
Window Class :
Window Process ID: 0
Window Thread ID : 0

Exiting...
ERROR: Invalid parameter detected in function (null). File: (null) Line: 0
ERROR: Expression: (null)


Unhandled Exception Detected...

- Unhandled Exception Record -
Reason: Breakpoint Encountered (0x80000003) at address 0x000007FEFDCB3C72

Engaging BOINC Windows Runtime Debugger...



********************


BOINC Windows Runtime Debugger Version 7.0.64


Dump Timestamp : 06/10/13 09:19:13
Loaded Library : dbghelp.dll
Loaded Library : symsrv.dll
Loaded Library : srcsrv.dll
Loaded Library : version.dll

---

Try uninstalling and going in to the registry and removing all mention of boinc then try installing again, worth a shot. Im sure someone will be along with a better idea at some point!

---

Thanks, I have already tried using regedit to remove anything that had "BOINC" or "Space Science" after unistalling the services configuration.

---

did the boinc service get uninstalled or is that still lingering about on the system?

---

The service was properly removed. it no longer appears in the list for services.msc.

---

Have you tried renaming the Boinc folder and the hidden data folder after you'd uninstalled Boinc? And then reinstalling, there might be some messed up files in there, I say this so that you'll be starting from fresh folders.

---

The T1 Trust, PRR T1 Class 4-4-4-4 #5550, 1 of America's First HST's

Do you use any 'special' Firewall?

---

 


- ALF - "Find out what you don't do well ..... then don't do it!" :)
 

I removed all directories for BOINC in "Program Files", and ProgramData, after uninstalling the service and cleaning the registry.

---

All machines are running Windows Firewall and McAfee Enterprise anti-Virus product.

I can not find any differences between the machines that work and the one that fails.

---

I see it launch "C:\Program Files\BOINC\boinc.exe" when I start BOINCmgr with the options "C:\Program Files\BOINC\\boinc.exe" --redirectio --launched_by_manager.

Is there a way to launch this from a DOS box to get debugging output?

---

I see it launch "C:\Program Files\BOINC\boinc.exe" when I start BOINCmgr with the options "C:\Program Files\BOINC\\boinc.exe" --redirectio --launched_by_manager.

Is there a way to launch this from a DOS box to get debugging output?

when you start from a Command prompt with neither -redirectio nor -detach_console you effetively get the event log output into the command prompt window.

from boinc.exe -help

--redirectio redirect stdout and stderr to log files

I don't think there is extra debugging output beyond that, but you could try.

i.e. just C:\Program Files\BOINC\\boinc.exe in a command prompt

err

that launch has an extra \ in the path - maybe check the other machines if that's normal?

---

A person who won't read has no advantage over one who can't read. (Mark Twain)

Yes the parameters for boinc.exe are identical on one of the nodes that is working.

Running from a cmd window did not yield any addition info.

---

All machines are running Windows Firewall and McAfee Enterprise anti-Virus product.

I can not find any differences between the machines that work and the one that fails.

Can you try (test) on the problem machine to switch OFF both Windows Firewall and McAfee anti-Virus
just to see will be any difference.

---

 


- ALF - "Find out what you don't do well ..... then don't do it!" :)
 

So did you get it working? You have six hosts that have an ATI GPU and match the other description. It's a bit hard to tell the right host.

If not:

- Callstack -
ChildEBP RetAddr Args to Child
0012a460 7161b1bd 00000001 0012ab60 00000000 00000000 KERNELBASE!DebugBreak+0x0
0012aa20 4004c6c6 00000001 400b9328 0012aa60 0012aa68 MSVCR80!_invalid_parameter_noinfo+0x0 (f:\dd\vctools\crt_bld\self_64_amd64\crt\src\invarg.c:100)
0012aa50 400538f7 00000000 00000001 00000000 00000000 boinc!std::vector<COPROC_ATI,std::allocator<COPROC_ATI> >::operator[]+0x0 (c:\program files (x86)\microsoft visual studio 8\vc\include\vector:762)
0012f8f0 4004e454 00000001 400f44c0 00000100 400e2bfc boinc!COPROCS::get_opencl+0xf (c:\src\boincgit\boinc_7.0b\client\gpu_opencl.cpp:318)
0012fbc0 4001a956 4009ec53 4009ec53 00000001 00868f25 boinc!COPROCS::get+0x12 (c:\src\boincgit\boinc_7.0b\client\gpu_detect.cpp:92)
0012fdd0 400648f2 00000003 00000003 00000001 0000005c boinc!CLIENT_STATE::init+0x0 (c:\src\boincgit\boinc_7.0b\client\client_state.cpp:386)
0012fe10 40064ca2 00000003 57b6c82f 00000000 00000000 boinc!boinc_main_loop+0x0 (c:\src\boincgit\boinc_7.0b\client\main.cpp:321)
0012ff20 400825b0 00130000 00000000 00130000 00000000 boinc!main+0x0 (c:\src\boincgit\boinc_7.0b\client\main.cpp:486)
0012ff50 76f9652d 00000000 00000000 00000000 00000000 boinc!__tmainCRTStartup+0x19 (f:\dd\vctools\crt_bld\self_64_amd64\crt\src\crtexe.c:597)
0012ff80 7752c521 00000000 00000000 00000000 00000000 kernel32!BaseThreadInitThunk+0x0 (f:\dd\vctools\crt_bld\self_64_amd64\crt\src\crtexe.c:597)
0012ffd0 00000000 00000000 00000000 00000000 00000000 ntdll!RtlUserThreadStart+0x0 (f:\dd\vctools\crt_bld\self_64_amd64\crt\src\crtexe.c:597)

It looks like BOINC is crashing in GPU detection. There is a change in ATI CAL/OpenCL detection in 7.1.x that for some reason didn't make it into 7.0.6x so you could try that version.

...when I start BOINCmgr with the options "C:\Program Files\BOINC\\boinc.exe" --redirectio --launched_by_manager.

You don't start BOINC Manager by starting boinc.exe --redirectio --launched_by_manager, then you only start the client and do so in a command line window.

Adding the --launched_by_manager attribute does do anything here. This attribute is only used by the Mac on OS X and does two things:
1. the client checks if the manager is still running, and exits if not.
2. it includes the size of the manager in the disk spaced used by BOINC.

---

I could not get McAfee removed so I wiped the system and re-installed the OS from the OEM partition. After I re-installed and I loaded the ATI optimized tasks with Lunatics v0.41 I reproduced the problem with windows firewall disabled and no McAfee installed. Running the stock apps worked fine but when I enabled the ATI optimized apps BOINCmgr started having problems again. There were a lot of messages about recent versions of ATI Catalyst not working correctly so I was trying to stay with version 11.12 of Catalyst. I found a post that someone had success with Catalyst v13.4 so I am trying to upgrade to that version.

I did not see that 7.0.64 was not the latest version so I will try downloading an updated version.

---

I upgraded to 7.1.x and now the ATI GPU are randomly disabled. sometimes it works
6/13/2013 8:08:19 AM | | Starting BOINC client version 7.1.15 for windows_x86_64
6/13/2013 8:08:19 AM | | This a development version of BOINC and may not function properly
6/13/2013 8:08:19 AM | | log flags: file_xfer, sched_ops, task
6/13/2013 8:08:19 AM | | Libraries: libcurl/7.25.0 OpenSSL/1.0.1 zlib/1.2.6
6/13/2013 8:08:19 AM | | Data directory: C:\ProgramData\BOINC
6/13/2013 8:08:19 AM | | Running under account NSITAdministrator
6/13/2013 8:08:19 AM | | Processor: 8 GenuineIntel Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz [Family 6 Model 42 Stepping 7]
6/13/2013 8:08:19 AM | | Processor features: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss htt tm pni ssse3 cx16 sse4_1 sse4_2 popcnt aes nx lm vmx smx tm2 pbe
6/13/2013 8:08:19 AM | | OS: Microsoft Windows 7: Professional x64 Edition, Service Pack 1, (06.01.7601.00)
6/13/2013 8:08:19 AM | | Memory: 7.96 GB physical, 15.92 GB virtual
6/13/2013 8:08:19 AM | | Disk: 921.51 GB total, 880.29 GB free
6/13/2013 8:08:19 AM | | Local time is UTC -5 hours
6/13/2013 8:08:19 AM | | CAL: ATI GPU 0: ATI Radeon HD 5400 series (Cedar) (CAL version 1.4.1646, 512MB, 479MB available, 208 GFLOPS peak)
6/13/2013 8:08:19 AM | | OpenCL: AMD/ATI GPU 0: ATI Radeon HD 5400 series (Cedar) (driver version CAL 1.4.1646 (VM), device version OpenCL 1.1 AMD-APP (831.4), 512MB, 479MB available, 208 GFLOPS peak)
6/13/2013 8:08:19 AM | SETI@home | Found app_info.xml; using anonymous platform
6/13/2013 8:08:19 AM | | Config: use all coprocessors
6/13/2013 8:08:19 AM | | Config: don't compute while wireshark.exe is running
6/13/2013 8:08:19 AM | | Config: GUI RPC allowed from any host
6/13/2013 8:08:19 AM | | Version change (7.0.64 -> 7.1.15)
6/13/2013 8:08:19 AM | Einstein@Home | URL http://einstein.phys.uwm.edu/; Computer ID 7458219; resource share 0
6/13/2013 8:08:19 AM | SETI@home | URL http://setiathome.berkeley.edu/; Computer ID 6823931; resource share 10000
6/13/2013 8:08:19 AM | | General prefs: from http://bam.boincstats.com/ (last modified 12-Jun-2013 18:07:29)
6/13/2013 8:08:19 AM | | Computer location: work
6/13/2013 8:08:19 AM | | General prefs: no separate prefs for work; using your defaults
6/13/2013 8:08:19 AM | | Reading preferences override file
6/13/2013 8:08:19 AM | | Preferences:
6/13/2013 8:08:19 AM | | max memory usage when active: 6112.51MB
6/13/2013 8:08:19 AM | | max memory usage when idle: 7742.52MB
6/13/2013 8:08:19 AM | | max disk usage: 10.00GB
6/13/2013 8:08:19 AM | | max CPUs used: 7
6/13/2013 8:08:19 AM | | suspend work if non-BOINC CPU load exceeds 25 %
6/13/2013 8:08:19 AM | | (to change preferences, visit a project web site or select Preferences in the Manager)
6/13/2013 8:08:19 AM | | Using proxy info from cc_config.xml
6/13/2013 8:08:19 AM | | Using HTTP proxy 172.22.224.168:8080
6/13/2013 8:08:26 AM | | Running CPU benchmarks
6/13/2013 8:08:26 AM | | Suspending computation - CPU benchmarks in progress
6/13/2013 8:08:26 AM | Einstein@Home | Fetching scheduler list
6/13/2013 8:08:28 AM | Einstein@Home | Master file download succeeded
6/13/2013 8:08:57 AM | | Benchmark results:
6/13/2013 8:08:57 AM | | Number of CPUs: 7
6/13/2013 8:08:57 AM | | 3353 floating point MIPS (Whetstone) per CPU
6/13/2013 8:08:57 AM | | 9328 integer MIPS (Dhrystone) per CPU
6/13/2013 8:08:58 AM | Einstein@Home | Restarting task p2030.20120224.G192.57-03.17.C.b0s0g0.00000_1624_0 using einsteinbinary_BRP4 version 133 (BRP4X64) in slot 7
6/13/2013 8:08:58 AM | Einstein@Home | Restarting task p2030.20120224.G194.35+00.04.C.b5s0g0.00000_1296_0 using einsteinbinary_BRP4 version 133 (BRP4X64) in slot 8
6/13/2013 8:08:58 AM | Einstein@Home | Restarting task p2030.20120224.G192.57-03.17.C.b2s0g0.00000_752_1 using einsteinbinary_BRP4 version 133 (BRP4X64) in slot 9
6/13/2013 8:08:58 AM | Einstein@Home | Restarting task p2030.20120224.G193.34-01.80.C.b3s0g0.00000_1264_1 using einsteinbinary_BRP4 version 133 (BRP4X64) in slot 10
6/13/2013 8:08:58 AM | Einstein@Home | Restarting task p2030.20120224.G195.01-00.18.N.b2s0g0.00000_2304_1 using einsteinbinary_BRP4 version 133 (BRP4X64) in slot 11
6/13/2013 8:08:58 AM | Einstein@Home | Restarting task p2030.20120225.G175.60-03.66.S.b5s0g0.00000_56_0 using einsteinbinary_BRP4 version 133 (BRP4X64) in slot 12
6/13/2013 8:08:58 AM | Einstein@Home | Restarting task p2030.20120224.G193.72-01.11.C.b6s0g0.00000_48_1 using einsteinbinary_BRP4 version 133 (BRP4X64) in slot 13
6/13/2013 8:08:58 AM | Einstein@Home | Restarting task PA0070_01271_378_1 using einsteinbinary_BRP5 version 134 (opencl-ati) in slot 14

---

These nodes are accessed remotely using MSFT RDP (mstsc.exe) will that cause the GPU applications to crash?

---

These nodes are accessed remotely using MSFT RDP (mstsc.exe) will that cause the GPU applications to crash?

Yes

@mikeej42

To remote access your hosts and avoid crash your GPU work, you could use a program like Teamviewer or Logmein (if you don´t want to be worry about the routers configurations or paid for the use - they are not free for comercial use) or a VNC for example (if you can program you router to send the right port to the right host, something hard to do when you have a lot of hosts as you have). I use thighVNC because is free and produces a low overhead to the host but basicaly any VNC does the same work. Of course there are a lot of others programs that makes the same job, i just point someones. The only thing thas is shure you must avoid the use of the MS RDP if you have a host with GPU, it always crash your video drivers due the way MS choose to load the video drivers after WIN 7. Why? Because you can't install Boinc as a service if you have a GPU after WIN7 (or vista i´m not sure) as we do with the old XT.

---