I may be a little late to this thread, but I struggled with this for about 6 hours and finally found a solution for my system and thought I would share in hopes it saves somebody else some grief. My setup is Windows 7 and MS Office 2007 with the constant save prompt happening in Word.

Here is my solution:
Launch Word and click the Office button in the top left.
Click Word options at the bottom of that menu.
Click Add ins on the left.
Click the Go button for COM add ins
Remove the checkmark for Bluetooth **(see options below if not allowed)
Click OK and close out of word.
Launch Word and problem should be gone.

** If you cannot remove the checkmark, you need to launch Word as an Administrator. To do this, close out of Word, find the executable in Program files\Microsoft\Office\Winword.exe or Word.exe and right click. Choose run as Administrator.

If this works and I have saved you lots of time and stress, sign up for an account and post a reply with loads of gratitude and well wishes.