It probably isn't adware, but ad aware is better than spybot for picking it up.
go to C:\WINDOWS\system32\drivers\etc and open the file called hosts in notepad. it should be readable - if there are any entries below the # bit other than
127.0.0.1 localhost
then delete them. you may need to restart your machine afterwards.
failing that, try updating windows and ie - upgrade it if you don't have the latest version (IE that is. or switch to firefox)