My security software says that I have a virus Trojan.Script.483139. It is located in the AppData\Roaming\Thunderbird\Profiles folder. Is this from you?
The directly path is Users\Chris\AppData\Roaming\Thunderbird\Profiles\sqmsakij.default\ImapMail\imap.googlemail.com\...changelog.htm
Wšě wotmołwy (1)
I can't find a changelog.htm in my folders.
Maybe that's an attachment to a message you got? I think it's dangerous to have security software try to rip out an attachment -- who knows what that might do to your mailbox. But if you see an attachment with that name, don't open it. (Unless you are software developer, you probably weren't going to be tempted by a change log anyway.)
If you can figure out the full path (the missing ... part might be helpful), maybe it will show which folder this message is in. Could be in Junk.