Windows 7 Software for removing index.dat files..?

hmm i wonder what internet history u wanna get rid of :D.... to be honest, use CCleaner, it will get rid of ure internet history, cookies etc for you.... if u want to wipe over ure "free space" u can use Ccleaner to do this, 1 pass is sufficient , never use Gutmann 35 pass's. its pointless and a waste of time, id say if ure gonna leave it run a 3 pass then data will be gone.

remember ANYTHING can be retrieved from a harddrive, if ure that paranoid about the data on ure harddrive then use a tool call

Hammer and Screwdriver