gosh

I have just installed Ccleaner and had a run of REG issues. It showed one unused File Ext. an .apv Running my usual Eusing Reg cleaner it found 3 unused file extensions - this didn't show the .apv but what am I to surmise from this discrepancy, just that all apps are not the same which is reasonable or that Eusing, in this instance, is more efficient? Thanks for any advice.