When I updated my Windows 2008 R2 Servers to SP1 via Remote Desktop I lost my RDP session when the machines reboot (which is normal). But after they are up and running again, when I try to connect via Remote Desktop, they cancel my connection. After some research I found that this happens if you install the Security Hotfix 2667402 before SP1. From the KB, under the “Known Issues” section: After you install security update 2667402 on a computer that is running Windows 7 or Windows Server 2008 Read more [...]