Long story short I believe I have a deep infection somewhere but at this moment I am dumfounded. Then again perhaps I am not infected which brings me here. Specs: Windows XP Pro w/SP3 and is updated; router, NOD32 ver 2.7, Superantispyware (SAS) Pro, snd Online Armor Pro. I am very careful while surfing. I don't use P2P file sharing at all. When I go to scan with NOD32 I receive this information "Error occured while scanning MBR sector of 1. physical disk Error Reading sector." It repeats the same thing except the 1 is subsituted with a 2. I then receive this message "User doesn't have administrator priviledges. Anti-stealth technology working in limited mode." Let me add that I am also receiving the same "Doesn't have administrator priviledges" for SAS (I am totally blocked from scanning), Malwarebytes (can't update), and even the Seagate Seatools for Windows is saying I lack administrator priviledges. Direction/advice/ideas will be most apptreciated.