|You might try going to start>internet explorer>tools>reset web settings>yes.|
Then go to start>control panel>display>desktop>customize desktop>web>place check to the left of everything except "my current home page">delete.
Restart the computer.
If you continue to have problems and would like to post a Hijack This log download Hijack This at this link http://www.tomcoyote.org/hjt/ then place it into a folder of it's on, such as C:\HJT, so that back up copies can be made and not clutter your desktop or other folders and the backup copies of deleted items can be easily located if needed.
Once saved double click HijackThis.exe, and press "Scan". When the scan is finished, the "Scan" button will change into a "Save Log" button.
Press that, save the log, Ctrl-A to Select All, and copy its contents into the text editor.
Do not fix anything yet unless you know what you are doing. This is a powerful tool that can crash the computer if used improperly.