Oh, my poor fingers hurt me right now.
After installing the main processor and having a look at how the graphics cards and possibly a sound card may attach to the motherboard, I had a look at the Noctua CPU cooler which I purchased very recently.
According to the leaflet included, there are four support screws which should be connected above or around the processor socket before two interconnecting metal bars which are flat but curved should then be fitted over these four screws. Possibly these screws should be fastened well enough to hold everything tight, even though you never should overdo such things. Anyway, I mistook it slightly wrong first and tried attaching to the cpu socket itself rather than the four holes surrounding it which are available for this purpose.
Then you are supposed to attach the Noctua CPU cooler itself, although the leaflet is suggesting you use that cooling paste in order to get the cooler fastened to the processor socket. For now I skipped that point. Next four additional screws which are different in shape should be fitted over the CPU cooler which ended up above the first four screws which were inserted.
Importantly, there are two longer coiled screws on each side of the CPU cooler located at the middle which aids at connecting the interconnecting metal bars. You should only tighten everything very fast when you are absolutely sure you got everything right. There is a long metal bar for the screwdriver which I in fact forgot to use. I will use it the next time if these screws need further tightening.
The problem first encountered was that when trying to tighten all these screws with the Noctua fan installed on top of the installed processor on the motherboard, first the motherboard had to be pulled out of the PC in order for me to be able to install the Noctua fan itself on top of the processor. Instead I chose to put everything on my living room table. The plastic which the motherboard came in was used as a cover for the motherboard against the table. This plastic I eventually had to pull away, leaving the motherboard lying directly on the same table.
It is therefore important that everything is fastly tightened before finishing up completely once you are certain that everything has been done in a correct way. I found one of the screws on the motherboard to not have been fastened enough when I had to pull it out of the box again.
Next the leaflet says that the Noctua fan should be mounted on the four support screws and secondly the four next screws being attached and fastened together with the two coiled screws located at the middle of the cooler. This I found not to be working out. Also when first checking out the direction of the fan at the front (there is one more fan located inside the Noctua cooler which in fact is a quite big unit), I assumed that it should point either towards the rear of the PC or straight in front of me inside the box. When attaching the fan, it had become the opposite way, either pointing downwards or upwards.
After connecting everything I found out that the fan was pointing downwards and in fact one of the slots for the expansion cards had been covered. Therefore I needed do redo everything regarding the installation of the fan and re-install it turned around 180 degrees. Now the fan blows downwards, but the awkward thing is that in both instances, the slots for RAM memory can not be accessed because the fan is so big it hinders direct accessibility for inserting the memory cards. I leave this difficult problem for at least tomorrow, possibly even longer.
I turned on the computer two times after connecting to mains. The first time was before I noticed that the CPU cooler had been installed the wrong way, the second time after completing my work. Apparently everything was working out including all the fans which comes with the machine. The only small thing I noticed was that for now there was no blue light diod at the front of the cover for the hard disc drives because no such drives has yet been attached. But possibly worse I noticed that the light diod for the processor on the motherboard lit up in red. Right now I do not know whether I blew the processor or maybe something else may be missing out. I will check out on all these things tomorrow evening.