Are you certain it's down to your Video/graphic system/drivers?
Could it be a bad memory module - you could run memtest86+ to check.
Have you been inside your PCs case to make sure all the components are seated properly.
Have you tried any other versions of PCLinuxOS (lxde - e17 - gnome etc) ?
Have you tried reinstalling with the latest 2010.7 version?
Yes my hardware is good. Otherwise it would not have worked on PCLOS 2009. As well, my pc is fully up to date.
I read somewhere a comment by old-pollack about Nvidia cards and their drivers.
He supposed there that often these cards work better with a driver created at the time the cards were developed.
So may be try an older driver from repo?
How do you install old drivers that are comparible with PCLOS 2009 but will work with PCLOS 2010? I thought this was not good to do because you can bork your system, not using something in the current repo that provides updates.
Check if there are other nVidia drivers installed, remove them.
Which drivers do I un-install? There is a list of them automatically installed by PCLOS for nvidia.