I am getting ECF errors when I open Outlook and "operation failed" when I try to Send/Receive e-mail in Outlook. I have tried Detect and Repair, scanpst and creating new mail profiles. I also renamed the extend.dat file (the file is present in two different user profiles) and removed the add-ins. Here's the story: I ran HP system recovery on a PC running Windows XP Media Edition after I was unable to recover from a registry cleaning utility. (I know - always back up the registry first - lesson learned). The system recovery did not format the C portion and lay down a fresh install like I expected it to. It did restore the OS (applied 101 updates) and the original software that came with the PC. I uninstalled the trial version of Office 2003 that came with the PC and installed a licensed copy of Office 2007. What should I do to repair this installation?