Detect and Repair is gone from the Office 2007 and has been replaced with Microsoft Office Diagnostics. It is a series of diagnostic tests that can help discover why a computer is crashing (closing abnormally). The diagnostic tests can solve some problems directly and might identify ways that you can solve other problems.
I know, because I was working on a Vista system and wondering why it was behaving badly, crashing and acting crazy. After looking at the event viewer I was unable to identify what was wrong and why all the errors.
Low and behold, when I ran the diagnostic in WORD, it indicated bad RAM. After using MemTest86 I was able to identify the bad stick.
Now it's back to as normal as Vista gets.
Here is how to access and run the Office Diagnostic: