I have the same symptoms as of yesterday. It was from AVG9. The works .exe file & the same .exe file (from what looks like an update folder) were detected & I put them into the virus vault. I updated to AVG 2011, restored them, but it also detects them as a trojan.
When I tried to open Works Word Processor, yesterday, AVG detected "trojanhorse2.BRUP" or something like that and it isolated worksWP.exe into the virus vault. This made WorksWP inoperable. I tried to reinstall it from the app folder on the recovery partition and it came up with the same problem. I then tried to use a copy of the installer that I put onto a flash drive back in August and the same thing happened. Is this a trojan or a false positive in AVG? I tried to use Virustotal.com to scan the works installer in the recovery partition but it keeps jamming.
This morning, AVG lost its virus database. Could this all have been the result of an poorly installed update to AVG or something actually hacking my AVG?
I updated Spybot and ran a scan of my computer with that, and it found nothing except for a few tracking cookies.
I have been using AVG antivirus free for years and this version for about four months and its never had a conflict with works before.