@SumTingWong
I have Win Update Stop running on 3 systems from a few months, I tried now to click on "Enable" button and all worked fine.
After a reboot I was able to check for Windows Updates again, so that's strange.
What Win Update Stop does is just keep the Windows Update service disabled (via its service application).
What I have noticed, is that sometimes there may be the need to repeat this loop 2 or 3 times:
1) Open Windows Update app and check for updates
2) Then if you get an error, reboot the system
Before doing these steps you will need to open Win Update Stop and click "Enable" button (to make sure Windows Service is not stopped) or uninstall Win Update Stop.
What are the exact issues you're having? Such as you keep getting errors when you try to check for updates via the Windows Update app?
Is there the possibility somehow that other security apps are preventing Win Update Stop to modify Windows Update service?
What version of Windows 10 are you running? 1809?
Can you make some screenshots or a video about the issue (i.e Windows Update service cant be started via services.msc)?