Make sure you still have the installation files for Panda 2010.
Download and run the uninstaller for Panda. Once the uninstaller completes you must restart the computer for changes to take effect.
After the reboot, run the Panda 2010 install to repair your current version then do another restart.
You'll find the Panda uninstallers download in these links:
Uninstaller for Panda 09: http://tinyurl.com/5xgm8m
Uninstaller for Panda 10: http://www.pandasecurity.com/resources/sop/UNINSTALLER_10.exe
Does this help?