Try doing doing some basic maintenance, such as a scandisk, disk defragment and then a disk cleanup. I'm not sure on XP, however under the run command they may operate as follows:
scandisk
dfrg.msc
cleanmgr
or they may all be under the 'start' - 'programs' - 'accessories' - 'system tools'.
Hope this helps.
99 Sport SE - Zetec
Mods: My wife vacuumed it last spring

, my son wiped up his hot chocolate spill

in December. My daughter found the tooth she lost last week

.