Concurrent Remote Desktop or Terminal Service on Windows XP

1. Apply TSS.REG file into registry

• TSS.REG

REGEDIT4 
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Terminal Server\Licensing Core] 
"EnableConcurrentSessions"=dword:00000001 
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 
"AllowMultipleTSSessions"=dword:00000001 
[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services] 
"MaxInstanceCount"=dword:00000003

2. Install Windows XP terminal service patch

3. Schedule a task to apply TSS.REG every restart.

• Start Windows Task Scheduler
• Add a task:
  • When: system starts
  • Action: "C:\Windows\Regedit.exe" /s "C:\Program Files\TSS.REG"

See Also:

1. Enabling Concurrent Remote Desktop Sessions on Windows XP SP3 - Patch file included
2. http://sig9.com/articles/concurrent-remote-desktop
3. http://www.kood.org/terminal-server-patch/