Hi,
I will walk through a few steps with you. Some of these are just to help figure out what is wrong, not to fix it right away. So if nothing changes after a step, that is normal. I will keep going until we solve it.
This is Credential UI Broker crashing it seems.
Did it started recently after an update?
Try a clean boot and let me know.
Press the Windows key + R to open the Run dialog box.
Type “msconfig” (without quotes) and press Enter.
In the System Configuration window, select the Services tab.
Check the box next to “Hide all Microsoft services”. Ensure you do it carefully, and not disable all Microsoft services.
Click on “Disable all”.
Select the Startup tab and click on “Open Task Manager”.
In the Task Manager window, select each startup item and click on “Disable”.
Close Task Manager and click on OK in the System Configuration window.
Restart your computer.
Hope that helps, and please contact us with any further questions. All the best.