This worked for me:
- Click on the start button.
- Type in “regedit”
- Navigate to
HKEY_CURRENT_USER\Software\Microsoft\Office\Outlook\Addins. - Then for each sub-folder listed, make sure the “Loadbehavior” file ends in a
2, for example,0X00000002. If one doesn’t double-click that file and change the number to 2. All should have that.
If it has anything else, especially 3 it is suppose to cause the main window to stay on top. One of my folders ended in 8 (0x0000008) and I changed to 2, restarted and works great now.
Previously, I disabled the addins under the Options/add-ins tab, but only briefly fixed the problem. the Lock/Unlock taskbar also did not change anything.