I am helping an 81 year old Grandmother with an apparent rootkit. I've tried mbr.exe which said it worked but didn't, I tried gemr.exe but it crashed. I just loaded avast and bought eset nod32 antivirus. I was hoping avast might do something but so far it just seems to lock thing up. To complicate things, she lives about 10 hours from where I live, so I can't get my hands on the pc. It looks like I need to reinstall, but when nod32 finally arrives, do you think it can help or should i just go ahead with a new installation? also I have a recent backup on a USB drive. I want the pictures and documents, is there a possibility of being infected from the USB DRIVE?