I was having similar problems. Whenever I would load a page, I'd get a message saying "An error has occurred in a script on this page." After I read this thread, I searched for hhctrl.ocx on Microsoft's support forum and found a post that recommended using MJ's Help Diagnostics (http://helpware.net/downloads/index.htm#MJs) to re-register the file. That did the trick with a little less trouble for me.