Follow the steps to run two instances of GTalk client simultaneously:
- Locate the existing GTalk shortcut or icon (It should be on your desktop or start menu or quick menu).
- Once located, right click on the icon and click on “properties”
- In the “Target:” field at the end of the line, leave a space and type /nomutex at the end of the line (look at the image below)
- Click “OK”
Start running two instances of GTalk right away!