Make a new account for yourself. See if Outlook works there. The prospects are very good. If it does it is "something" in your current account.
Then try to remove everything that's related to Outlook from your current account and try again. Still no luck? Then continue using your new account and delete your old one once you've transferred everything you need.
I've seen lots of answers about Outlook not opening, but haven't seen one that answers my problem, yet. We have WinXP SP3 (I think) and Microsoft Office 2007 on our family computer. I have an administrator account, as does my wife. She has used Outlook 2007 as her ONLY email program ever since we got the software (2+ years?) and has NEVER had any problem with it. I, however, cannot open it in my user account. I think (my memory isn't what it used to be) I've used it before, in my user account, but it's been a while. I'm using mostly Hotmail and Gmail, now. When I try to open the program, an icon appears on the far right on the Taskbar. Nothing happens. I thought it may be messed up in some way, so I opened Task Manager to force it to close, but there were no programs running. I'm at a loss. Can anyone help?