Ultimate Boot CD for Windows (UBCD4Win)
UBCD4Win is a bootable recovery CD that contains software used for repairing, restoring, or diagnosing almost any computer problem. Its goal is to be the most complete and easy to use free computer diagnostic tool. Almost all software included in UBCD4Win are freeware utilities for Windows.
A list of tools included on the cd: http://www.ubcd4win.com/contents.htm
I found this bootcd useful for removing virusses and spyware from pc’s that were not able to boot anymore due to infections. With UBCD4Win it is possible to prepare a cd with the most recent signature files from multiple antivirus and spyware protection packages, boot into it, and scan and remove these malware infections.
Some links for those in need of the good old bootable floppydisks: