I did a Boot-Time Scan for the first time. It's so slow, I went to bed and let it run all night. It found a Trojan, Java:malware-gen trj.
I recently did a clean install of Windows 7, and it saved all my old window files, and this is where the Boot-Time Scan found it.
I think it's strange that Avast never found it before. I did many scans with Avast under the old windows, and it always showed zero files infected.
I just wonder why a Boot-Time scan wold find this, when scanning from the Avast program didn't find it?
The file is: C:\Windows.old\Users\Johnny\AppData\LocalLow\sun\java\deployment\cache\6.0
I don't have Java on my computer, I removed it months ago when I read it was a security risk.