I was trying to block MSN Messenger to run on a Win2k Professional. Trying to block it in registry so that even administrator's will not be able to run it. I tried the following but didn't work: HKCU\Software\Policies\Microsoft\Messenger\Client .. Dword value "PreventRun" 1=enable, 0=default I also tried HKLM tweak I found in Google, but they don't seem to work for Win2K. Any Idea??