Machine specs and which games would help...
All the best Brett
It's a rather old machine, but I've been able to run MW2 etc just fine on it before I reformatted a while ago.
AMD Athlon 64 3500+
3.0 GB RAM
ATI Radeon HD 4650
Antec 350w PSU
The games that don't work: CoD 4, CoD MW2, Dota 2.