To disable the updating of the file access time add this line in your CONFIG.SYS
If you don't have that many drives just remove the drive letters, or add them if the other way. Drive letter A: is disabled by default.
ACCDATE = C- D- E- F- G-
You can find this tip in your CONFIG.TXT in the WINDOWS directory MS Info
Doesn't work for Win95 MS KB182465
Doesn't work for WinMe MS KB274646