I got zapped today by some Malware that mimicked Win 7 security alerts. I picked it up at torcache.com. It blocked the opening of any program on my computer, except browsers and win explorer. I finally had to get into Linux (dual boot), access drive C: and delete folders created today in /users/myname/appdata/local/ and so forth. That took care of it.
Avast did not find the malware in a system scan. (At some point I finally got Avast to start a scan.)
The Malware was trying to get my browsers to access wXw.av-force.net to obtain anti-virus software, but Avast would block it each time. I found out later that av-force.net & .com are involved.
I’ve gotten viruses in the past, but never anything like this malware that had me blocked at almost every turn.