Just a couple days ago, the SecurityTool Trojan popped up on my computer, I used PCTools Spyware Doctor and Antivirus to attempt to get rid of it, but it came back as Windows something-or-other, and apparently there was also a Rootkit, both were found by Spywaredoctor and -supposedly- removed. Initially MalwareBytes would not run (mbam.exe deleted upon installation or something), but I used the method of saving the exe as something else on another computer and bringing it over to the infected computer via a USB flash drive. MWB has found and deleted several Trojans, but I don't think they're gone because every time I try to install MWB as a test to see if the Trojans are gone, the mbam.exe file is gone again. Here are the Hijackthis and MWB log files. The MWB log is from the first scan I did, before rebooting. Now MWB shows 0 infections, but I know they're still there. AVG detected and "healed" something not too long ago.