Computer very slow now after recent file copies.. 'thumbs' file lo

Tech-Archive recommends: Speed Up your PC by fixing your registry

Hello- Anyone who knows microsoft windows xp profess. 2002 please help if
you can.

I have a slow computer now, boxes drag open and closed, response is so slow.
I recently copied digital photo files to a CD to clean the disk. A box to
"confirm stream loss" opens on some files and reads - file 'thumbs' has extra
info attached to it that may be lost if you continue copying. The contents
of the file will not be affected. Do you want to copy file still?

Maybe this slowed my computer down..? I recntly degfragged and did a disk
cleanup. Also disinstalled some programs not used. No improvement. PLEASE
HELP! Email me if you can, this would assure I receive your solution!
Domindart@xxxxxxx Thank you so much. Brent.

PS Maybe I simply need RAM. But I really dont think my comp is that full.
(60% of disk used I beleive)
.