ok, as I can see you gave results for:
vendors which detec it right now according to virus total: a-squared
- Trojan-Dropper.Win32.Mudrop.flp!A2 (note that "A2" at the end it means that only a2 engine of the a-sqaured detected it. (a-sqaured uses it's own a2 and Ikarus AV engines)) A-sqaure is known for some False Positives. CAT-QuickHeal
- Trojan.Agent.ATV (not sure about QuickHeal) McAfee+ Artemis
- Artemis!9DF7B80C4E0B(note: McAfee dosen't detect it. It is detected by McAfee Atremis only!) Artemis is cloud based technology, known for some False Positives... TheHacker
- Trojan/Downloader.gen (can't comment on this one)
Further analyses of "C:\WINDOWS\CLOSESEC.EXE" led me to finding to this: https://forum.f-prot.com/index.php?topic=1694.0
as you can see it's official F-prot (AV company) forum.
And as you can see a few months ago, this file was detected by F-prot as malware aswell.
But look at the last post by F-Prot virus researcher/developer that it is probably False Positive and soon will be deleted from database.
Now from virustotal link you posted, we can see it has indeed been taken out of database.
So, I would say it is probably False Positive. P.S.
Just noticed the Original Poster on the Forum link I gave uses laptop from Toshiba like you.