Hello
There are several methods you can try to fix the issue with Runtime Broker shutting down your PC:
Check for malware: It’s possible that malware could be causing this issue. You can check the process C:\Windows\System32\RuntimeBroker.exe with a secure task manager.
System File Checker (SFC): You can run the system file checker. Open Command Prompt and type sfc /scannow.
End Task in Task Manager: If Runtime Broker is using more than 15% of your memory, you might have an issue with an app on your PC. To stop Runtime Broker from using so much memory, select Runtime Broker in the list, select End task to close Runtime Broker, and then restart your computer.
Registry Editor: Open ‘Registry Editor’ app in Windows PC via Windows Search Box and navigate to the following path HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\TimeBroker. Now, change Start=dword:00000003 to dword:00000004. Once done, restart your computer and check if the issue is resolved.
System Configuration Utility: Open the run box by pressing the Windows Key + R and type msconfig. On the General tab, click the selective startup and make sure that load system service and load startup items both have checked mark.