Bingo! Thought it was this causing me no end of problems... If anyone else needs the fix to re-associate msc's then here's a link:- MSC association Fix
Hello, I agree that it is a great product and I too am encountering the same problem. Always happens after using "Registry, Scan for Issues" - which nearly always brings up 107 problems to fix. Any ideas how this can be resolved cos it's a right pain in the butt waiting for Office to reinstall? Thanks. P.S. Obviously un-ticking the Unused File Extensions is a workaround, but not ideal. (this also resolves my issue of deleting the MSC association).