Be sure and patch your windows machines…
Here’s another discussion of it on Spiceworks:
To fix that, make sure that you’re using a private network. RDP this computer can’t connect to the remote computer – This is another common problem with RDP. To fix this issue, be sure to check both your antivirus and firewall.
It’s very important for the people who are using RDP to have their Windows updated every time.
Yes, updating in time the system is a good way to keep your RDP working good. Because a lot of people are not updating their systems, they have problems with RDP.