Starting this post so that I can keep the appropriate links in one place and at the top of the post. Here is what you will need to get concurrent sessions working in Vista (Business and Ultimate Versions only!).

1. Patched termsrv.dll
1. 32bit version here
   
2. 64bit version here
2. Follow this guide from missingremote.com

Note: Again, this will only work for the Business and Ultimate versions of Vista, of which only Ultimate has Vista Media Center. Also, if you use the download link from the guide, be sure to check the comments for the most recent version of the 32bit dll and the 64bit dll.

The HopTo links aren't working to get the DLLs. Where else can I get these??? I need the 64-bit version.

Can anyone please send this to me? ryan@faricy.net is my email. I broke my Terminal Services by installing the 32 bit version without even thinking, and going back to the original 64 bit DLL isn't working now. Service starts with a "is not a valid Win32 application" error.

I'm confused.
That article links back to the thread here that has the instructions for doing this for every version of Vista. Where did this "business and ultimate only" thing come from? Works fine for me on HP.

I followed the instructions to enable concurrent sessions with Business and now when I connect I just get the error as if RDP is disabled. What am I missing?

This is an old thread.

Try these links

http://thegreenbutton.com/forums/thread/297600.aspx
http://thegreenbutton.com/forums/11/210408/ShowThread.aspx
Here are the basics though

SP1 broke it so you have to run a new patch to fix it.
http://www.coffincruisers.com/rdpclip.zip
Install SP1 then run whichever batch file matches your version of Vista.

It worked, thank you very much.

hi guys, i want to try the concurrent remote desktop on win vista ultimate, can u give me the dll file and the registry file pls . just link them here .