Termsrv.dll Windows 8.1 Patch

. OK, I have it working. The problem of course was the ini file. I have used a lot of programs that have line numbers in the ini files and so it didn't surprise me that yours contained line numbers.

What did surprise me is that by clicking on the 'Raw' button on your web page I was presented with another line number free image of the ini file. I still was unable to replace the older ini file without booting into WinPE. It would be very helpful if you could spell out a procedure to over-write the ini file or release an update to you program that contained the latest file. All that said I have to tip my hat to you and admit that you have developed a very clever tool that I am sure will be of great use to many.

Need help patching a termsrv.dll, Windows 7, 6.1.7601.22843. RDPwrap does have this termsrv.dll patched, but I do not use RDPwrap due to massive stability and reliability issues that have in the past cost me a datacenter run.

When the termsrv.dll patch fails I can still login but when RDPwrap fails, it can deny connections even if you want to use it without multiuser. Anyways, I have attached what RDPwrap uses to 'fix' RDP. Can binary patches be developed easily from this information or is working knowledge of IDA needed? 6.1.7601.22843 SingleUserPatch.x86=1 SingleUserOffset.x86=1A655 SingleUserCode.x86=nop SingleUserPatch.x64=1 SingleUserOffset.x64=17F96 SingleUserCode.x64=Zero DefPolicyPatch.x86=1 DefPolicyOffset.x86=19E25 DefPolicyCode.x86=CDefPolicyQueryeaxesi DefPolicyPatch.x64=1 DefPolicyOffset.x64=17D6E DefPolicyCode.x64=CDefPolicyQueryeaxrdi 6.1.7601.22843; Patch CSessionArbitrationHelper::IsSingleSessionPerUserEnabled; Imagebase: 6F2E0000;.text:6F2FA64F lea eax, ebp+VersionInformation;.text:6F2FA655 inc ebx. Click to expand.

Solutions & Technology. Microsoft patch KB4022720 for Windows 8.1 broke the previous termsrv.dll concurrent patch. The previous version of termsrv.dll was 6.3.9600.17415.

The new version after KB4022720 is 6.3.9600.18692. Interesting that the patch for 6.3.9600.17415 still works for 6.3.9600.18692. The patch just needs to be applied at a different location. I assume you know how to stop termservice, take ownership of termsrv.dll, make a backup copy of termsrv.dll, and use a hex editor. The following is for Windows 8.1 PRO x64.

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Patch

Termsrv.dll versions 6.3.9600.17415 and 6.3.9600.18692. It has been tested by me to work on both versions. Search for: 39 81 3C 06 00 00 0F 84 D3 1E 02 00 and replace with: B8 00 01 00 00 89 81 38 06 00 00 90 The following is for Windows 8.1 PRO x86. Termsrv.dll versions 6.3.9600.17415 and 6.3.9600.18692.

Windows 8.1 Messenger

It has NOT been tested by me. Search for: 3B 81 20 03 00 00 0F 84 2A D5 00 00 and replace with: B8 00 01 00 00 89 81 20 03 00 00 90 As a side note, the open source utility RDPWrap has been updated to also support termsrv.dll 6.3.9600.18692 for Windows 8.1. For Windows 10 users, it appears that the new Creators build has broken RDPWrap for Windows 10 Home edition. It still works for Windows 10 PRO to enable multiple concurrent RDP sessions. No word yet if the developer is going to find a solution to the changes the Creators build introduced in Home edition. It may be that Microsoft is putting an end to Home users being able to RDP into their computers. Hex patching may also no longer be feasible for Windows 10 Home Creators build and beyond.

Credit for the patch code belongs to contributors on 'www mysysadmintips com' and 'forums mydigitallife net'. Thanks to anyone and everyone who has helped identify and share termsrv.dll patches to all of us over the years. Need help patching a termsrv.dll, Windows 7, 6.1.7601.22843. RDPwrap does have this termsrv.dll patched, but I do not use RDPwrap due to massive stability and reliability issues that have in the past cost me a datacenter run.

When the termsrv.dll patch fails I can still login but when RDPwrap fails, it can deny connections even if you want to use it without multiuser. Anyways, I have attached what RDPwrap uses to 'fix' RDP. Can binary patches be developed easily from this information or is working knowledge of IDA needed? Click to expand. I too prefer to patch than use RDPWrap and as long as new patches are created and shared I will continue to use them. I don't see anything wrong with RDPWrap after reviewing the source code, but I have never actually used it. I just prefer to keep things simple and keep things as vanilla as possible.

I looked at the RDPWrap.ini file to see if there was a way to translate the RDPWrap patch code to a simple hex patch. But since RDPWrap appears to be an interface to termsrv.dll and not a patcher for termsrv.dll I'm not sure it is possible to create a hex patch from the RDPWrap patch codes.

It uses a different approach than just patching code. At least for me I decided it was not worth the effort to pursue further. But if you figure out a way to create hex patches from the RDPWrap patch codes I hope you will share it with the rest of us. Click to expand.I'm not going to argue about this.

I prefer a simple hex patch on an original MS DL. You prefer installing a program, modifying the registry so the service Terminal Services actually calls rdpwrap.dll instead of termsrv.dll, and etc., etc., etc. There are usually mutiliple ways to get things done. Doesn't mean only one way is right and all the other ways are wrong. Different people have different preferences and opinions on the best way for them.

It's nothing to argue about or fight over. I also prefer to patch the DLL manually.

The x64 codes shown below worked for me. I would also like to report that the same substitution also works for version 18708. To explicitly summarize in the format of the original post below: Microsoft Patch KB4025335 (or KB4034681) for Windows 8.1 broke the previous termsrv.dll concurrent patch. The previous version of termsrv.dll was 6.3.9600.18692.

The new version after KB4022720 is 6.3.9600.18708. The following is for Windows 8.1 PRO x64. Termsrv.dll versions 6.3.9600.18708. It has been tested by me to work.

Search for: 39 81 3C 06 00 00 0F 84 D3 1E 02 00 and replace with: B8 00 01 00 00 89 81 38 06 00 00 90 I have not tried or verified x86, so I will not include the text below here. Microsoft patch KB4022720 for Windows 8.1 broke the previous termsrv.dll concurrent patch. The previous version of termsrv.dll was 6.3.9600.17415.

The new version after KB4022720 is 6.3.9600.18692. Interesting that the patch for 6.3.9600.17415 still works for 6.3.9600.18692.

The patch just needs to be applied at a different location. I assume you know how to stop termservice, take ownership of termsrv.dll, make a backup copy of termsrv.dll, and use a hex editor.

The following is for Windows 8.1 PRO x64. Termsrv.dll versions 6.3.9600.17415 and 6.3.9600.18692. It has been tested by me to work on both versions. Search for: 39 81 3C 06 00 00 0F 84 D3 1E 02 00 and replace with: B8 00 01 00 00 89 81 38 06 00 00 90 The following is for Windows 8.1 PRO x86. Termsrv.dll versions 6.3.9600.17415 and 6.3.9600.18692.

It has NOT been tested by me. Search for: 3B 81 20 03 00 00 0F 84 2A D5 00 00 and replace with: B8 00 01 00 00 89 81 20 03 00 00 90 As a side note, the open source utility RDPWrap has been updated to also support termsrv.dll 6.3.9600.18692 for Windows 8.1. For Windows 10 users, it appears that the new Creators build has broken RDPWrap for Windows 10 Home edition. It still works for Windows 10 PRO to enable multiple concurrent RDP sessions. No word yet if the developer is going to find a solution to the changes the Creators build introduced in Home edition. It may be that Microsoft is putting an end to Home users being able to RDP into their computers.

Hex patching may also no longer be feasible for Windows 10 Home Creators build and beyond. Credit for the patch code belongs to contributors on 'www mysysadmintips com' and 'forums mydigitallife net'. Thanks to anyone and everyone who has helped identify and share termsrv.dll patches to all of us over the years.