... Defender seems to be all that a sensible user needs. It is all I'm using on my Windows 10 system and I have had no problems after a couple of years." It also comes with an offline scan function which runs without starting Windows. That is the only way to detect the most serious malicious code. And only Microsoft can provide it, because only they know exactly what should be in each and every Windows file. It also costs nothing. regards, Martin. All you need is one of these. 2983_082026_130000000.jpg This was my test lab where we spent huge amounts verifying product compatibility with MS. Admittedly we were creating drivers which MS would cheerfully break every time they put out a new release. And, I think you are quite right. You can't possibly diagnose every possible installation issue. There are far too many variables. Cheers! Andy Last edited on 9 Sep 2017 01:37 by Andrew Barrowman posted: 9 Sep 2017 01:52 from: Martin Wynne Thanks Andy. It looks like you also spent a fair amount ...