Remove Heur.JS.Downloader effectively and permanently

I believe my desktop computer is infected and that it is now spreading to my other devices via my home network. Heur.JS.Downloader was found by Emisoft. Scans by both Avast Anti-virus and Malwarebytes showed nothing. MS Malicious Software Removal Tool showed 11 infected files while the scan was running, but when it ended it said no infections were found and no list of those 11 files were shown.

Information we can get from above