A point not made on this thread which I believe is important to know/realise ..
(& thanks to geoscomp for pointing it out elsewhere, I hadn't noticed it wasn't made clear here).

If you find yourelf with some virus or other, be aware that you can't of course depend on your installed AV program to clean it up properly as thats potentially compromised, else how did you get the virus ?

Best advice then is to try another program, perhaps an online one to make sure you killed everything, if you have something that can run outside windows to check, so much the better !