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are you trying to RDP from the internal network or from an external source?<br />
If external, test it from the internal network to confirm if the PC is actually at fault.<br />
<br />
Check if any services have stopped and check the event viewer around the time it stops working as this should give you a good direction to start with.<br />
<br />
Otherwise, check for any scheduled tasks or group policy updates, as the fact this occurs after a specific amount of time may give you a clue what could be causing it.
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are you trying to RDP from the internal network or from an external source?
If external, test it from the internal network to confirm if the PC is actually at fault.

Check if any services have stopped and check the event viewer around the time it stops working as this should give you a good direction to start with.

Otherwise, check for any scheduled tasks or group policy updates, as the fact this occurs after a specific amount of time may give you a clue what could be causing it.

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okey dokey. did you find anything in the event viewer?
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okey dokey. did you find anything in the event viewer?

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This solution solved the problem. We are still watching it to see if it comes back.
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This solution solved the problem. We are still watching it to see if it comes back.

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This issue has been going on for several months. We are running a domain network on a SBS 2011. The workstation in question is running Windows 8.1 pro with all Microsoft updates installed. <br />
After booting up the workstation we are able to remote into it for about an hour. Then RDP is unable to connect, connection fails before we are prompted for user credentials. <br />
Remote access is enable. <br />
Windows firewall is allowing remote desktop connection. <br />
Symantec endpoint protection has been removed.<br />
<a href="https://filedb.experts-exchange.com/incoming/2015/06_w25/919282/RDPerror.JPG" target="_blank" class="file-inline" title="Error message (35 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>RDPerror.JPG</a>
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RDPerror.JPG

This issue has been going on for several months. We are running a domain network on a SBS 2011. The workstation in question is running Windows 8.1 pro with all Microsoft updates installed. 
After booting up the workstation we are able to remote into it for about an hour. Then RDP is unable to connect, connection fails before we are prompted for user credentials. 
Remote access is enable. 
Windows firewall is allowing remote desktop connection. 
Symantec endpoint protection has been removed.

Remote Desktop stops connecting to Windows 8.1 workstaton after a while

Remote access may refer to the connection to a data-processing system from a remote location, for example through a virtual private network remote desktop software, terminal emulation, or the activation of features of a business telephone system from outside the business's premises.

Remote Access

Windows 8 is a personal computer operating system developed by Microsoft as part of the Windows NT family of operating systems, with an emphasis on improving its user experience on tablets. In particular, these changes included a touch-optimized Windows shell based on Microsoft's "Metro" design language, the Start screen, a new platform for developing apps with an emphasis on touchscreen input, integration with online services, support for USB 3.0, Advanced Format hard drives, near field communications, and cloud computing. Additional security features were introduced, such as built-in antivirus software, integration with Microsoft SmartScreen phishing filtering service and support for UEFI Secure Boot on supported devices with UEFI firmware.

Windows 8

The Windows operating systems have distinct methodologies for designing and implementing networks, and have specific systems to accomplish various networking processes, such as Exchange for email, Sharepoint for shared files and programs, and IIS for delivery of web pages. Microsoft also produces server technologies for networked database use, security and virtualization.