I wanted to modify the delayed start time threshold for one of my services.
If you want to tweak your delaytime, do the following in regedit:
1. Open Regedit.
2. Navigate to your service, in my case it was HKLMSYSTEMCurrentControlSetservicesPlexService
You should see that the “DelayedAutostart is set to 1.
3. To increase the default delay of 120 seconds, right click the registry key and add new key AutoStartDelay (DWORD (32-bit), like mine: HKLMSYSTEMCurrentControlSetservicesPlexServiceAutoStartDelay
4. Set the decimal to your default value. Like mine: 300
5. Reboot, and see if the service autostarts after x seconds.