If it is slow or you have any other problem
How to Fix Outlook Not Responding Issues: Troubleshooting Tips and Tricks
If you are having problems with an Office program such as Word, Excel, or Outlook, you can always run a repair. This will attempt to fix any issues that are preventing the program from loading properly or causing other problems.
To repair Office, first open the Control Panel and then click Programs and Features.
Click the version of Office you have installed, and then click the Change button.
