After commenting on this thread, I took a look at fragmentation on my own c: drive. I only use it for the OS, programs and the Documents and Settings folder. I don't use My Documents at all. I noticed that the fragmentation is quite high. I have a lot of file operations on my pc but on other drives. The majority of ops on the c: drive are only concerned with temp files from various applications.
It may be useful to move the Documents and Settings folder to a separate partition so that the fragmentation can be limited to that area (which can be defragged separately to the c: drive). It looks like moving the folder after XP is installed is an arduous task from the info I can find, but sounds a good idea in principle. Anyone got experience with this?
Starman*
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~ if all else fails, read the instructions