Outlook Signature Button Not Working

To work around this issue, uninstall the pre-installed Microsoft Office Desktop Apps:

1. Right click the Windows Start button and select Settings.
2. Choose Apps, and then select Apps and Features.
3. Select Microsoft Office desktop Apps and select Uninstall.
4. Restart your PC.
5. Run a repair of Office to make sure everything gets fixed.

   If this method is unsuccessful, follow these steps to remove the Office setup registry keys:

   1. Press the Windows key + R to open a Run window.
   2. Type regedit and select OK.
   3. If prompted, select Yes in the User Account Control window.
   4. Press CTRL + F to launch the Find window and enter this key in the search box:
      0006F03A-0000-0000-C000-000000000046
   5. Select Find Next.
   6. Delete the key by right-clicking on the entry and selecting Delete.
   7. Press F3 to repeat the search and delete each one until no more registry keys are found.  There are MANY, so be patient.