Firefox was working fine. A dialogue box appeared after an unrelated restart to say firefox was downloading updates after which I could not open firefox and got the following error: firefox.exe - Bad Image The application or DLL C:\Program Files\Mozilla Firefox\xul.dll is not a valid Windows image. Please check this against your installation diskette. Was this due to updates? Do I really need to do a clean reinstall? How do I get my bookmarks back if I do? == This happened == Every time Firefox opened == User Agent == Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)