I encountered something really weird that was causing a server to be completely unresponsive. I was able to run get-service and restart, look at the event viewer remotely but could not RDP nor console to the machine.
The problem was related to an application generation a bunch of 1KB files. This application generated close to 4 million files. Yes 4 Million files on and NTFS volume and caused the system to be unresponsive.
If you run remove-item * from PowerShell, it wil take sometime to delete those files between 1 and 2 hours. Make sure the application is not generating any logs