cannot move virus to chest

My quick scan has picked up 3 infected files -“PUP Win 32-BProtectA(PUP) -Severity low” Action -move to chest. When I clicK APPLY, There is the message " ERROR: The process cannot access the file because it is being used by another process (32)" Can anyone help please?

"PUP Win 32-BProtectA(PUP)
PUP = not a virus / Possible Unwanted Program

a adware that will give you ad popups or redirects when surfing or using search engines

it usually comes bundled with other downloaded programs…

follow instructions and attach logs…not copy and paste. http://forum.avast.com/index.php?topic=53253.0

run in order listed
AdwCleaner / Malwarebytes / OTL

when done removal experts will be notified and help you
when finish, all tools used will be removed

I am having a similar, but slightly different problem. My Mac has been inundated with viruses (mostly Wimad mp3 files, and Malware) and once I downloaded avast! I found quite a few on my hard drive. Since I performed numerous Time Machine back ups I plugged in my external and ran the antivirus program. They found 25 files infected, mostly duplicated viruses from the ones I erased before, although some new ones were present. When I clicked to move these files to “Virus Chest” it did appears with a pop up window saying "Failed to chest /Volumes/.Trashes/Directory name…/Location/iTunes/File Name. No such file or directory." I can then only select Cancel, Skip All or Skip.

I am confused why this does not let me move the files into the Virus Chest. If they were detected on the hard drive is it not the same process to rid of them, as it worked on my Hard drive? Can someone help? I desperately need my computer back and functioning properly without all these viruses (including in my backup files)!

Thanks in advance.

[b]My Mac[/b] has been inundated with viruses (mostly Wimad mp3 files, and Malware) and once I downloaded avast!
post in avast for Mac forum section....