Cannot read files

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Also, after every scan avast says I have over a thousand files which cannot be scanned which all start with either:
amd64
wow64
WINDOWS
does this happens when you back up your files on an external drive because this is what I have done. Thanks again

[Pondus]

How to handle files avast cant scan
https://blog.avast.com/2014/02/28/how-do-i-handle-files-that-avast-cant-scan/


Give us location / full file path or a screenshot and we may be able to tell you what they are

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Hi it's WinSxS. I'll send a shot asap

[Pondus]

Hi it's WinSxS. I'll send a shot asap

Windows update files

Run CCleaner and they should be gone at next scan  http://www.piriform.com/

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Oh ok, so they are not needed, and no harm will come from deleting them? Also what is wow64? Can I keep them if need be? Are they useful? Thanks

[Pondus]

CCleaner (Crap Cleaner) remove unnecessary files with one click and it is safe

Reviews  https://www.piriform.com/ccleaner/reviews

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Ok will do. What is wow64

[Pondus]

Ok will do. What is wow64

https://en.wikipedia.org/wiki/WoW64
https://msdn.microsoft.com/en-us/library/windows/desktop/aa384249(v=vs.85).aspx

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Will CCleaner delete word files?

[Pondus]

Will CCleaner delete word files?

https://www.google.no/amp/s/www.howtogeek.com/172820/beginner-geek-what-does-ccleaner-do-and-should-you-use-it/amp/

I use it with default settings and have never ever had a problem

The also have a forum / FAQ section