I accidentally downloaded a Legion Loader virus, how screwed am I?

I went to a few websites that I didn't notice were scams and ended up downloading a msi installer file with the name "Koqlpo Cynav tool", it came on zip files with a password being of the current year, I did open the .msi installer but closed it half way before it finished and did a system restoration (with "Keep Files" on, there is no way I can backup everything now, and I don't have a flash drive with windows for an offline install anymore), my computer is currently plugged off the internet now and I don't know what to do, I did many antivirus scans (windows defender, malwarebytes, hitmanpro, etc...) and none catched up a thing, but I heard that legion loader is really hard to detect for usual antiviruses. How screwed am I? Could it have been carried over to the new windows installation? Are all my previous .exe files compromised? What should I do in my current situation?