All the files you submitted have been uploaded to virustotal before. When you click on the "permalinks" in the pages you posted, it leads to the reports for each file.
In the case of the first file, 18 out of 41 scanners flagged it as malicious,
In the case of the second, 29 out of 41 flagged it.
Those results give a pretty solid indication that it is not a false positive, and should be treated as suspicious, until proven otherwise.
I suggest you zip and password the files in the folder you copied them to, or delete them from that folder, to prevent inadvertent activation (another user, a "senior moment', etc.)
In the case of the third file, it appears to be a normal Windows system file. Did you copy a system file to virustotal?
Serious gamers tend to use top-end systems, highly spec'd, sometimes running on basic operating systems to reduce resource consumption, it can be a serious business.
This costs money, and a lot of regular gamers disable the applications that cause even the slightest slowdown, to give them the edge. Including disabling the AV, in some cases, ironically, at a time it's most needed.
A few years ago I was involved in helping someone who was a WoW player, who had had his identity stolen. Turned out there is a bit of money to be made by selling stuff online, WoW goodies included, and there was a rash of trojans affecting gamers, specifically WoW gamers at this time.
It makes sense to me that gamers would be seen as sometimes easy targets. Maybe what you are seeing is the same sort of thing happening again?
I have no idea about how a thief might infect another gamers' computer, or load their application on to the game, but it happens. It might be appropriate to let someone in authority concerning WoW know about this.
Other experienced users will probably know the answer to that.