Your system information

• Steam client version (build number or date):
• Distribution (e.g. Ubuntu): arcolinux/windows 10
• Opted into Steam client beta?: [Yes/No] Yes
• Have you checked for system updates?: [Yes/No] Yes

Please describe your issue in as much detail as possible:

I installed steam on arcolinux to try a game via proton the game did not work, so i reinstalled windows but i backed up my steam folder i had on linux and was in the process to copy it over to another internal backup drive since i copied it to an external backup drive initially, during the copy windows defender popped up with a "severe threat" warning with the name of Trojan:Win32/Occamy.C it found it in: D:\Steam games\steamapps\common\Proton 5.0\dist\share\wine\mono\wine-mono-4.9.4\support\installinf-x86.exe Obviously i am unsure if this is a false possitive but defender seems to think it is a severe threat. Just informing you guys. Thank you for all your work.

Steps for reproducing this issue:

1. install a proton game and copy it to a ntfs partition drive
2. then run a updated windows 10 and copy that linux steam folder to
   
   another ntfs partition using windows