[Update: It looks like Avast has resolved the problem. Virus defs version 090719-0 do not have the problem. Right click the Avast icon in the system tray and go to the updating menu if you need to force the update. I removed the exclusion I had below and all was well.]
I went to start Windows Live Photo Gallery a little while ago and Avast popped up a message that it was a generic trojan. I was 99% sure it was a false positive as I’d run the program earlier and the Avast virus definitions had been updated since then. But to be save I went to the Kaspersky Online Scanner and scanned the file which was reported as safe. Other files in the WLPG directory were also being flagged as trojans.
So, I had to exclude the directory from being checked in order to run the program. The way to do this is a bit hidden so here’s how:
1. Open the On-Access scanner and go to the Standard Shield and click the customize button. Then click the Advanced tab:
2. Then click the Add button and enter the path to exclude. You need to include a file specification so in my case it was
C:Program Files (x86)Windows LivePhoto Gallery*.*.
If I start Avast and let it do a memory scan while WLPG is running it reports it as a trojan but at least I can run WLPG now. I did go through their process of reporting a false positive which hopefully others will do and it will be cleared up soon.