Script SNH-gen [trj] detected on PC

Hello! Please, help me deal with an issue.
The first notification of a blocked threat “Script:SNH-gen [trj]” appeared after closing a microsoft.exel file on my desktop. Later, it started popping up after closing any file from microsoft on the desktop. Avast claims that the file “desktop.LNK” is infected. I downloaded Malwarebytes, Dr. Web curelt, Kaspersky virus removal, they didn’t find anything connected with or even close to this threat. I also cleared the registry with Ccleaner and scanned some of the “infected” files with virustotal, nothing was found. I then scanned the PC again, no threats were found. So I opened another microsoft file and got the same threat notification. Screenshots attached.
What can I do to solve it apart from panicking?

Hi there, I am getting the same problem as above.

Hi. Today I have had the same problem opening Excel files.

Hello. I have the same problem on my Windows 7. On Windows 10 all OK.