I remember about 10 years ago there was a running joke about AOL users posting on forums with "I agree", simply because they did agree and had nothing else to contribute (and some were looking to boost their post count for credibility).
Galdorf, I'm finding that "slow" machines are usually caused by an HDD that's beginning to slow down, not necessarily die. Several times I've replaced drives, and the speed picked up massively. And not just clean installing windows, even on imaging.
Problem is, IMO, there's no real way to "test" an HDD for speed issues. Not that I know of.
Ditto here. I have one on the bench at the moment. The HDD is running a bit too hot and was quite slow to scan with hdd regen. This seems to be the common denominator for me - if it's slow to scan with hdd regen it'll be slow once cleaned up with 1Gb of RAM.
I also strongly suspect that SP3 is crippling older XP systems. I have not had the time to test it yet.