Avast found an infected email and after some problem deleting it, I found it was stored in the Avast file on explorer..I managed to delete it.
Later today, I scanned my PC again and it found another infected file..one my grandson had downloaded..it was a game. I deleted that successfully.
Out of curiosity, I scanned my PC with Panda and it found the following infected file. I have put it into my recycle bin as I do not know if I really need it.
C:\windows\system\activescan\imscan.dll
What should I do about this file???