I am using Windows 10 on HP EliteBook 850 G4. In last few months, sometimes there occurs a hang of the system. Firefox shows "Does not respond", explorer.exe (task panel) doesn't respond, but I can for example minimize some windows and change focus to window on second screen. Even keyboard shortcuts for Task manager or Ctr+Alt+Del do not work.
In half a minute, everythink returns to normal and works as nothing was wrong. But in a few minutes, the issue is back. Sometimer reboot helps, but just for a few hours. Some days this doesn't occur at all. I haven't found any shedule in it.
A few times I happened to have opened Task manager window and every time when this hang occures, the service "Remote procedure call (RPC) jumps up to first place with 30% CPU use. But the processor is still not used more than 50%. I tried to google this symptoms and have only found one message with suggestion to disable OneDrive. Today morning whed the hang occured again, I closed OneDrive (right-click and "Exit"), but in a few minutes, the hang returned. I have no way to test if the issue is solved, the hang uccurs "randomly".
Is there any way to find, which process uses RPC service at the moment? Maybe Wireshark can help, but I don't know the correct filter option to find this communication.
I have tested the OS for malware and so on with McAfee (company licence), Malwarebytes and even Microsoft Safety Scanner with no positive result.
UPDATE 1
Only error found in event log was:
The machine-default permission settings do not grant Local Activation permission for the COM Server application with CLSID... where CLSID points to RuntimeBroker.exe
I will check again when the hang occurs again, if this error log correlates
