Not sending out an sos yet, just a couple of questions -
I ran a routine boot-time full scan on my pc last night and Avast discovered two threats - win32 pup and win 32 patched-adq. In mid scan, I told Avast to delete the first (pup), which it successfully did, and then when it found the second, to delete that as well. But I got a message saying that Avast couldn't delete it, and got the same message when I tried to repair and move to chest. Then I did another boot-time full scan, only this time Avast didn't find any threats.
Can a virus do that - get detected once during a scan, then become invisible for any subsequent scans?
Note that when Avast detected the patched-adq, it was in a file (C:\[something].sys). Now that file doesn't appear to be there anymore (and I've made windows explorer display hidden files). Could this mean the delete was successful after all?