Try this vundo (winfixer) removal tool SpywareSweeper
When open the page click on "download SpywareSweeper" from this line:
Delete Win32/Vundo.522752!Trojan automatically >>> Get PestPatrol or Download SpySweeper
Afterwards run ccleaner to clean up the temp files.Remember that ccleaner will empty the recycle bin so if you have anything in there that you want to keep uncheck the box beside "recycle bin".
If you still have problems you will most likely need to post a Hijack This log so that the files associated with the hijacker/malware can be identified. You can download Hijack This at this link <a href="http://www.tomcoyote.org/hjt/">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.