Thanks Guys, you've made me feel better already.
I have just deleted a bunch of atdmt,fastclick,valueclick, files as I am sure that they were unwanted cookies originally. I note that every one was followed by a recovery file. Which I assume covered the preceeding file now deleted? So these can go as well?
A huge number were RECYCLER PROTECTED files so I guess I don't need these either?
The Avast scan (which took 4 hours) does not give me a reason for not being able to scan. It just says 'Unable to scan:Ar' and no times or dates are given so I would not know if they were over 2 weeks old.
Sorry I cannot give you the full list as Tech suggests but I cannot copy and paste at all.
Hey, I used to use Norton (not a free one either) and they have no Forum like this. I found their renewal system completely unuser-friendly and very frustrating. That's why I jumped at Avast once I heard of it. This is fantastic. Thanks for your help.
Any further comments would be more than welcome.