My Windows 2000 installation recently stopped running files with the .msc extension. I've tried reinstalling the Windows system files but short of reinstalling, I'm lost on what to do next. This also seems to be affecting my office installation. Since I've tried recovering my original system files with the Windows 2000 cd it now wants to install office for me to run any of the normal office apps but to do so, I need to run the installer which uses a .msc file. I also can't get into anything that calls an msc such as defrag or the running services. Anyone have any ideas?