I got hit by a nasty little bug "mwdmaud.sys." I spent several hours trying different antivirus software (Spybot, AVG, Adaware, RunAlyzer, Avast) . This particular is bug redirects all your google searches (you get the google homepage, but all the links are changed). Several differernt searchs turned up the solutions starting from blessing your computer all the way up to reformating the hard drive. Avast was the one that gave the easy fix. Here it is, I hope you do not need it.
delete/rename/move the file
Technology Integrator[log in to unmask]
The St. Johnsbury Elementary School
257 Western Ave - St. Johnsbury, VT 05819
802-748-8912 Fax: 802-748-1095