Someone I know bought a buget PC some time back. What
surpriced him was that his computer couldn't run a piece of
graphic-intensive game that he bought for his kids. I think
the game was called 'Unreal' or something.

I don't want something like that to happen with my upcoming
purchase. Maybe I don't use some software yet. But I want
to know what software P4 2.4Ghz CPU with 256MB DDR RAM can't
handle excluding those server software and business oriented
software.