Buying ram? Heh first time i played VC, i had a computer with 128MB so comparing with todays PC's ram's its not much. And as he said VC worked for him. So if rebooting didnt worked, he must have last time installed new drivers or some other crap.
Btw. i remember i have installed from Windows Update an Office Live blablabla. After this gta and other games wont start too
. I have used the "recover pc" thing :/.
But back to the topic. Kingston must say if he has last time installed something new on his PC. Maybe installing VC on D:\ instead of C:\ could help too. It helped me with GTA SA rofl.