Concurrent Sessions

Download the termserv.zip file below and extract it somewhere. (You have to be registered to see the file) Reboot into Safe Mode. This is necessary to remove Windows File Protection. Copy the termserv.dll in the zip to %windir%\System32 and %windir%\ServicePackFiles\i386. If the second folder doesn't exist, don't copy it there. Delete termserv.dll from the dllcache folder: %windir%\system32\dllcache Merge the contents of Concurrent Sessions SP2.reg file into the registry. Make sure Fast User Switching is turned on. Go Control Panel -> User Accounts -> Change the way users log on or off and turn on Fast User Switching. Open up the Group Policy Editor: Start Menu > Run > 'gpedit.msc'. Navigate to Computer Configuration > Administrative Templates > Windows Components > Terminal Services. Enable 'Limit Number of Connections' and set the number of connections to 3 (or more). This enables you to have more than one person remotely logged on. Now reboot back into normal Windows and try out whether Concurrent Sessions in Remote Desktop works. It should!

(now all you have to do is find termserv.zip)