Recently I've encountered problems with what I think may be a rootkit. I've been having heating issues with my GPUs, they reach 60c on idle, and going around a few forums, I've noticed a services.exe in a few different places and a strange user, HomeUsers, who is not inherited and has special permissions which apply to "this folder only". When I go into change permissions, the option is greyed out. Anti-virus isn't picking anything up (McAfee) and a check disk showed nothing. Do I have a rootkit, and if so, what can I do?