If you have multiple users on your Windows XP machine, you might have heard it is possible to patch the terminal services service, to support multiple concurrent remote desktop connection (via RDP) to your computer.
Around the time Windows XP SP1 was released, a patched version of the file termsrv.dll could be found on the Internet, replacing this file with your existing one enabled the concurrent remote sessions support.
Yesterday I upgraded to Windows XP SP3 (you may ask if it isn’t too early? maybe so, but since I’ve already been using the latest RC for some time now, I felt confident enough to apply this update on my home computer). Anyhow, after updating to SP3, I discovered my computer no longer supports concurrent remote sessions.
Short Googling returned few articles explaining how to patch the termsrv.dll to support concurrent sessions, so I pulled out my favorite HEX editor and with few clicks everything was up and running again.
To save so time for other users (and myself when upgrading more computers), I’ve packaged the updated termsrv.dll file with another file that will make the required changes to your registry. (see the included readme.txt file for further instructions).