Whenever Microsoft releases a security update or service pack that updates Remote Desktop components, it will overwrite your modified termsrv.dll with a fresh, locked version.
If you follow those guidelines, the Universal Termsrv Patch can turn your humble Windows 7 64-bit workstation into a surprisingly capable multi-user terminal server. Just don't let Microsoft know. universal termsrv patch windows 7 64 bit
The ZIP folder typically contains two files: UniversalTermsrvPatch-x86.exe (32-bit) and UniversalTermsrvPatch-x64.exe (64-bit). You must use the x64 version for a 64-bit system, or the patch will fail. Whenever Microsoft releases a security update or service