Upon running Hitman Pro, it detects Steam as a trojan, I’m guessing this is a false positive.
Log has a been attached.
Have you checked files at virustotal?
post link to scan result
Already have
The steam.exe file is for steam and is safe for use unless you have Sality/Vitro infecting it.
Yes Steam should be safe, I’m just guessing that it is a false postive. Since this has never happened before and Avast seems to be ok with it. And I hope nothing has infected it 
Chances of you having Sality are slim
That’s good to hear.