I've got a 64-bit Dell laptop, running Windows 7 Home Premium, and I'm all but certain it's picked up a nasty bug. I cannot download anything on any browser (tried IE, Chrome and Opera, Opera being my default browser). I'm always told the download has been "Interrupted: virus scan failed." This apparently is because my Windows Security Essentials is turned off, but I can't turn it back on. When I try, I get the message: "an error has occurred during initialization: Error code e0x800700c1.
I don't have additional malware detectors installed and can't download anything. Does anyone have a suggestion as to how I can fix this without downloading any tools?