Worked for me ! Thanks a lot! But , it only worked on one of my two WinXP Pro installations. Both are nLite, but one is heavily optimized for professional audio and music production (as many services as possible turned off, registry editings and more). The music WinXP's MFU list would not work whatsoever. Any ideas? Maybe re-enabling a service will solve the problem? Thanks! Thanks man its work HKEY_CURRENT_USER \ Software \ Microsoft \ Windows \ CurrentVersion \ Policies \ Explorer NoInstrumentation value