I walked away from my PC for a bit and this window had popped up. I didn't get to see it happen so I don't have too many details except for what it looks like:
I still have it open if there is something else I can do to check its origins, all I know is that it's related to the explorer.exe process. The "Messenger" service is disabled so I am not sure where else this could have come from, I am not seeing any bizarre new processes started either. Any ideas what I should do now?