I think I have a serious virus and/or malware on my deskstop PC. I cannot update windows vista 32bit, windows defender or any antivirus I install on the computer. I tried to follow the 8 step removal process but I malware bytes will not launch after installation. I have run out of ideas on how to clean up my PC. reformating and reinstalling is not something i want to do as i have a lot of important information on the computer. Any help will be greatly appreciated.