My puter is suddenly asking for a password when I try to unzip a .zip or .rar file with 7zip or ZipGenius. Since I didn't tell it to do that I don't have a password. This has not been a problem in the past. I've tried cleaning out history, cache, etc. with CCleaner and resetting my Comcast modem and restarting the computer to no avail. Any way to get rid of this annoying problem so I can unzip some files?