Remote Desktop/Terminal Services has two settings for multiple sessions. You can either allow multiple sessions per user (in which case if you log in twice, you'll get two sessions), or force a single session per user (in which case you can only log

To change this setting, you'll need to perform a registry change. The following steps describe the process:

  1. Start Registry Editor (by default, this is located at c:\windows\regedit.exe).
  2. Go to the following registry key:
  3. If the fSingleSessionPerUser value doesn't exist, create a new DWORD value named fSingleSessionPerUser
  4. Open the fSingleSessionPerUser value. The possible values for this setting are as follows:0x0Allow multiple sessions per user0x1Force each user to a single session
  5. Enter the new setting, and then click O