Yahoo Messenger is a real-time communication services via text, video, sound and video. Perhaps you’ve been able to activate only one account, but by following the steps below, you will be able to activate more than one  account Yahoo! simultaneously.

  1. Open registry editor by clicking Start menu, then click on Run, then type Regedit, and press the enter key.
  2. The next step, click the sign (+) on the key HKEY_CURRENT_USER – Software – Yahoo – pager – Test.
  3. On the right side of Test window, do right click, then select New and select DWORD Value data type.
  4. Give it a DWORD with the name of  Plural.
  5. Click two times DWORD plural, and fill in value with the number 1, and select Base Decimal.
  6. Close the registry editor, click 2 times icon Yahoo! Messenger to login first account. After the login is successful, do the same thing again or from the Start Menu, select Yahoo Messenger for the second account login.

Look at below! it works !