Download the Universal Termsrv.dll Patch by DeepXW and unzip it. Prefer manually backing up original Termsrv.dll from C: Windows System32 folder. Right click and Run as Administrator the appropriate patcher exe depending on your OS version. For 32bit (x86) select UniversalTermsrvPatch-x86.exe.
Microsoft offers the Remote Desktop Protocol (RDP) in Windows to allow remote desktop connections, and while most versions of Windows include a RDP client, only the Professional, Ultimate and Server editions offer the RDP server to accept incoming connections.
Unlike server editions of Windows, Microsoft limits the client editions of Windows to one concurrent user, whether remote or local. So if a remote desktop connection is made, no one physically at the PC can use it or even see the desktop without first kicking off the remote user.
However, we'll discuss how you can remove this limitation so that multiple users can log in simultaneously. Thus a remote user(s) can log in to their account while also allowing a local user to log in to their account when physically at the PC.
This limitation can be bypassed by applying an unofficial modification called the Universal Termsrv.dll Patch, which is provided by a developer who goes by the handle DeepXW:
10 Steps total
Step 1: Download
Download the and extract the ZIP file.
Step 2: 32 or 64
Find the patch program you should run based upon your processor. For 32-bit (x86) it's UniversalTermsrvPatch-x86.exe and for 64-bit (amd64) it's UniversalTermsrvPatch-x64.exe.
Step 3: Note
While the patch program will automatically create a backup of the Termsrv.dll file, to be cautious you can manually save a copy yourself. You'll find the file at WindowsSystem32, and to undo the Registry changes it makes, you can save the .reg file that's included with the download and manually edit the Registry to remove the changes shown in the .reg file. For Windows XP you'll want to save the xp.reg file, and for Windows Vista and 7 its vista.reg.
Step 4: Install
Right-click on the patch program and select to Run as administrator.
Step 5: Registry Change
On the program, click the Patch button and it will replace the Termsrv.dll file and perform the Registry modification. It will also save a backup so you can later undo the modification if desired.
Step 6: Restart
Next, restart your computer for the modification to take effect.
Step 7: Enable RDP
Right-click on Computer from the Start Menu and select Properties.
Step 8: Remote Settings
Click Remote settings on the left.
Step 9: Select Option
Under Remote Desktop, select one of the three options.
Step 10: Add Users
Administrators on the computer will automatically be added to the list of remote users, but if you need to add standard users, click Select Users.
Windows should automatically configure Windows Firewall to allow the RDP traffic to pass through, but if you have a third-party firewall installed on the PC, you may have to manually configure it to allow the traffic.
As with normal remote desktop connections, remember that to remotely connect over the Internet you must configure your router to forward incoming RDP connections to the desired PC. And unless you perform other RDP settings modifications to change the RDP ports in the Windows Registry you're basically limited to configuring one PC on the network for incoming connections via the Internet.
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