Multiple Remote Desktop Sessions in Windows XP

ENABLE MULTPLE DESKTOP SESSION IN XP

First

1. -> Start computer in Safe Mode.
2. -> Disable Remote Desktop Connection and Terminal Services. 

1. -> Right click My Computer properties & click remote opetion.
2. "Allow users to connect remotely this computer " uncheck this box.
3. ->  Control Panel - > Administrative Tools ->  Services -> Terminal Services  Properties
4. Select Disabled opetion.

Second

1. Copy Terminal Services "DLL"  and Save it
2. Go C:\Windows\system32\dllcache
3. Rename the termsrv.dll to termsrv_dll.bak.
4. Copy the downloaded termsrv.dll file to C:\Windows\system32\dllcache.
5. Open the C:\Windows\system32 folder and delete termsrv.dll in C:\Windows\system32

Third

     1.  You can edit the Windows Registry  
     2.  HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal                 
          Server\Licensing Core 
     3.  Add a Keyword EnableConcurrentSessions and give it value "1"

Forth 

     1.  You can edit the gpedit.msc 
     2.  -> Computer Configuration -> Administrative Templates ->  
          Windows Components ->     
          Terminal Services and click Limit number of RDP 
          connections.
     3.  Right click My Computer properties & click remote opetion 

     4.  ->  "Allow users to connect remotely to this computer"

                                             -> Restart PC