Windows – Remote desktop is not working – no port 3389 is bound

On a Windows7 Pro the remote desktop stopped beeing available.

This is what I checked:

• Port 3389 is not available from extern (telnet .... 3389 does not work but telnet .... 445 works)
• netstat shows that there is no prozess listening at port 3389
• "Remote Settings" is configured with Allow connections from computers running any version of Remote Desktop ...
• the services (Remote Desktop Services, Remote Desktop Configuration and Remote Desktop Services UserMode Port Redirector are running)
• The service Cryptographic Services is also started
• windows firewall is disabled
• no third party firewall is installed
• In the registry is port 3389 configured at ..\Control\TerminalServer\WinStations\RDP-Tcp
• resetted the ip stack but without success

The customer says that it was working in the past.

Edit
In the netstat log (netstat -abn) isn't any entry like

TCP    0.0.0.0:3389           0.0.0.0:0              LISTENING

and telnet

telnet 10.15.100.101 3389

does not connect from the localhost and from a remote host in the same network, although the firewall is disabled and other ports (like 445) do listen and do answer.

Edit2
Found a similar thread here and the suggestion it may be caused by: KB2830477. Didn't help.