I believe my computer has a malware virus, as the date and time keep reverting to midnight on December 31, 2001.  In addition, whenever I did anything on the Internet, I received a notification thatt here was something wrong with the security certificate and I should download a new certificate -- which I did not do.  I have run Webroot scan four times, and everytime it says a threat has been removed.  However, nothing is displayed under Quarantine.  I saved a scan log, but cannot locate the threat that was removed.  While I no longer receive the security certificate notification, I am still having problems with the date and time.  Has anybody experienced this problem recently and, if so, how did you fix it?