I know I read an answer for this issue a couple of years ago, but I can't seem to find it. I have a P4 2.6GHz HT CPU, and Seti@Home/BOINC had been running fine processing two work units at once as it detected the CPU as 2 processors. I just installed a new HDD and a clean install of XP with SP3. Device Manager shows 2 CPUs, yet BOINC only detects one. I copied over the BOINC directory from my old HDD prior to installing the current version of the software, and it seems to have picked right up from where it left off, apart from this CPU issue. BOINC Manager is set to use 2 processors max, as are both my Home and Work settings. Can someone please direct me to a solution?

---

Check if you're not using the local preferences (through BOINC Manager), which will override any settings you have on the web-preferences.

You can recognize this is you have a message alike this in your messages:
21-Jun-08 20:35:30||Reading preferences override file

If you see anything like that, or if you navigate to your BOINC directory and see you have a global_prefs_override.xml file, you're using the preferences set through BOINC Manager. You can clear them like so:

BOINC Manager->Advanced View->Advanced->Preferences, click Clear.
The changes should take immediately, if they don't, update Seti.

---