I had a particularly nasty worm that kept reappearing on my pc after each reboot. So my antivirus company wrote me a custom cleaner. Unfortunately it destroyed my file associations and now everything I try to open takes me to an open with window. They sent me this file but did not tell me how to use it. I am thinking that I need to reformat because rundll.exe is gone as well. Can someone please help me?
FileAssociationRestore.reg