One thing I found is System Restore works if you keep things simple. I use System Restore to do a quick test of drivers or apps. If they work, I don't need to do a restore. If there are issues, I'll do some light basic troubleshooting, and then use System Restore if I can't resolve the issue immediately. Key world being "immediately".
Also... a major difference between System Restore and a "backup" is System Restore does not backup "
user data and documents". If you deleted a personal file, a System Restore isn't going to get that file back. System Restore just backs up the registry and system files to be returned to their previous state before the restore point was created.
With that, if the OP was/is hoping to retrieve some lost data from their Outlook files. I'm afraid System Restore can't do that.
System Restore monitors system changes and saves the system state as a restore point. If a system problem develops as a result of a system change, the user can return the system to a previous state using the data from a restore point.
docs.microsoft.com