Actually Malke was also right, I didn't notice.
Vista by itself is a step backwards for Microsoft, comparing to good old
WinXP

But Malke is right about memory.
Get 4GB memory, don't even bother with 2GB as prices have come down, I got
high-end Corsairs two 2GB LAPTOP modules a total of 4GB for mere $50,
desktop may cost even less.
You can end up paying even $35 for no-name generic memory, but even Corsairs
don't cost much. Besides Corsair, try QCZ, Micron, Kingston is a very
common OEM supplier (but not for high-end).

The worst is probably K-byte and PNY, cheap trash.
Try mad ein America or at least Europe, Taiwanese are most abundant but I
dont pick those, mine are made in Colorado, USA by Corsair (not ValueSelect
which i smade in Taiwan).

OK to make this rant short:
Get 4GB memory.