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Did you update the video driver? &nbsp;if so try to roll back to the older version, sometime the video driver caused such issue. &nbsp;Same as the NIC driver, sometime the driver update from windows update is not for the model which also caused the problem as well, try to roll back both driver to the older version and see if it helps.<br />
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Did you update the video driver?  if so try to roll back to the older version, sometime the video driver caused such issue.  Same as the NIC driver, sometime the driver update from windows update is not for the model which also caused the problem as well, try to roll back both driver to the older version and see if it helps.



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Use video at optimum resolution
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I have 4 file servers and only one of them gives me problems with RDP. &nbsp;Occasionally you cannot log in at all or your session is booted right after you log in( within 3 seconds). &nbsp; The most common error message is &quot;Because of a protocol error, this session will be disconnected. &nbsp;Please try connecting to the remote computer again.&quot; Sometimes there isn't evena an error message but the session abruptly ends. &nbsp;The server is running Server 2003 SP2 with the latest updates. &nbsp;When I check the event logs there are certificate errors with RDP. &nbsp;However, the server is configured to not use certificates for RDP. &nbsp;
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I have 4 file servers and only one of them gives me problems with RDP.  Occasionally you cannot log in at all or your session is booted right after you log in( within 3 seconds).   The most common error message is "Because of a protocol error, this session will be disconnected.  Please try connecting to the remote computer again." Sometimes there isn't evena an error message but the session abruptly ends.  The server is running Server 2003 SP2 with the latest updates.  When I check the event logs there are certificate errors with RDP.  However, the server is configured to not use certificates for RDP.  

Issue with RDP

The Microsoft Server topic includes all of the legacy versions of the operating system, including the Windows NT 3.1, NT 3.5, NT 4.0 and Windows 2000 and Windows Home Server versions.

Microsoft Server OS

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).