okay!
ill clear all your wrong thoughts.
i installed it on my computer. i found the problem and fixed it. it was just because my NTFS partition had developed bad sectors and i installed it on my FAt32 partition.
secondly, the games running like butter on my computer and its fun to play. i dont feel it lag even a bit. and i have ended games like doom 3 on this machine and happy to do it. so dont be a high end machine showoff, if you like to play play anywhere you want.