I recently had problems with my Outlook 2007 on my Windows XP Pro system at work. Basically, the program wouldn't start up properly. It would start and then encounter an error and try to restart itself (unless I unchecked the box to tell it not to). It would then try to start itself in »Safe Mode» (does that imply that the normal mode is unsafe?), but that would also fail. I tried uninstalling Outlook and re-installing it, but that made no difference. I tried uninstalling and reinstalling the entire Office 2007 suite, but again, that made no difference. In the end, I found a website that described the same symptoms and proposed a solution. It was the User Profile that was corrupted - not the program itself. By creating a new profile, I was able to get Outlook running again, but it would still throw a few errors, especially after I had imported my folders and messages from my old profile. Then I found an even easier way - a FREE program that fixes up corrupted Outlook Profiles. After running this on the old profile, Outlook worked perfectly. So if you have the same problem of Outlook not starting up, check out Olfix. It might just save you a lot of time and frustration.