Can not play any games and system freezes.

Hello group.

A friend recently put together my new system, using Windows Vista Home
Premium ( OEM ) 64 bit OS around two weeks ago. Some other bits of interest
are: core 2 duo E6850 processor; 4GB RAM; Asus Maximus Formula MB; Nvidia
GForce 8800GT Video Card and I am using the onboard sound from the Mother
board.

My friend built this system and installed the OS. Now the system will
freeze during many different tasks. While downloading files from a driver
update site, ( NVIDIA ) I clicked the start menu, the system froze up. I play
Games, LoTRO, Call of Duty, Crysis, Battlefield2 and 2142. Most of the time
these games will freeze while I am logging in, at other times they will just
reboot the system or very rarely they will just crash back to the desktop.

All the latest drivers and windows updates have been installed and
reinstalled and re-downloaded from their respective sites. Still I am having
this problem. I have spent the last two days going through the forums here
looking for similiar problems and responses. A lot of great information is
out there, unfortunately no specific solutions to my problem.

No anti-virus programs are installed, running only the security measures
that come with Vista. Oh, and Microsoft wont support their product in chat,
phone or e-mails unless i pay blackmail to them, so they are a bust in the
support area.
Any Help would be appreciated
Thank you

Thom.