After installing Windows Service Pack 2 for Windows 2003 we are unable to RDP into the Windows 2003 SP2 machine.

Error message

“This computer can't connect to the remote computer. The connection was lost due to a network error. Try connecting again. If the problem continues, contact your network administrator or technical support.”

Event ID

Event Type: Error
Event Source: TermDD
Event ID: 50
Description:
The RDP protocol component "DATA ENCRYPTION" detected an error in the protocol
stream and has disconnected the client.

RESOLUTION
==========

-Check the version of the file termdd.sys in c:\windows\system32\drivers. The file version afetr installing SP2 should be 5.2.3790.3959. If it is not, then replace this file from a working machine which has SP2 installed for 2003.

or
Copy the “termdd.sys” file from the Service Pack 2 cab folder located in “%WINDOWS%\Driver Cache\i386” to the “%windows%\system32\drivers”.