If you are trying to change the start-up type of your Sync App, but the option is unavailable or greyed out (shown below), this would be due to you not having admin access on the PC. A user who has an admin account on that PC would need to login and change it for you using the same steps!
Why is the option to change the start-up type of my Sync App unavailable?
The reason why the option to change the start up type of your sync app would be greyed out.

Written by Emma Carroll
Updated this week
Updated this week