Not Busy,,these Are

Hello all,,,,ive tried cleaning space on drive c:,and also backup of c:drive.both came back with errors.they cannot access.......
C:\WINDOWS\COOKIE\index.dat..maybe busy
C:\WINDOWS\HISTORY\HISTORY IE5\index.dat..maybe busy
C:\WINDOWS\Temporary Internet files\content IE5\index.dat..maybe busy
I wasnt connected to net at either time.I use win98se and AOL8 IF THATS ANY HELP!Is there something wrong or is this the norm.

Cheers

ps....I installed ieSPYAD Into the registry which seems to work really well,but could this be anything to do with it?