## Index.dat

Kame Krazee asked about making a dummy copy of index.dat but there's an easier way - just add the following line (with the appropriate path if it's different) to the beginning of the autoexec.bat file:
@del c:\windows\cookies\index.dat

Every time the PC is booted the index.dat file is deleted, and when Windows starts up it re-creates it as an empty file.