I've also asked the question on superuser.com, don't know how many from here are reading that website however, so a repost here:

The number of connections to this computer is limited and all connections are in use right now. Try connecting later or contact your system administrator.

I get this (error-)message from time to time, when I try to unlock my Windows 8 Pro - Tablet. I have also a Laptop running Windows 8, where I've never seen this error before. I remember it from times, with Windows 7 and XP or 2003 Server, when somebody (or too many people) were accessing the computer via Remote Desktop.That's why I disabled Remote Desktop and everything I could find about it on my tablet, after I've seen the Message the first time.

Usually I get it ~once or twice a month. The only "solution" I've found so far, is to turn of the tablet by holding the power button ("hard reset")

Any ideas which application or bug could be causing it?

And AFAIR, in Windows 7, I could say that I want to kick out the other people so I can log in - do you know, how I can do it in Windows 8?

My user is the only user on that system (=> I have administrator permissions)

Thank you for your help, cheers - Peter

Hi,

It seems that the issue is related to drivers. Please download and install the latest drivers from your tablet's manufacturer and test the issue again.

Thanks.

I'm sorry but that answer sounds like nonsense.

What kind of drivers? Video? Network? Mouse? What would cause that kind of behavior?

Hi,

It seems to be related to network drivers.

Thanks.

Please try to run the following command to repair the computer.

dism /online /cleanup-image /restorehealth