forcedel
ForceDel deletes files that are in use by other processes.
ForceDel uses some exciting new APIs introduced with Microsoft Windows Vista to determine which processes have a specified file in use. With this information, ForceDel is able to close the file in the remote process address space and then delete the file.
Starting with version 1.2, ForceDel can also delete files on Windows XP.
This project has moved to https://github.com/michaelknigge/forcedel