You can check if Endpoint Protection is installed by checking the registry key.
HKLM\Software\Panda Security\AdminIE\Protections
Check whether the following key exists:
HKLM\Software\Panda Security\AdminIE\Protections
If it does, go to step two. If it doesn't, then the protection is not installed.
Get the WAC value. The data associated with this value indicate the location of the protection installation.
If it exists and it is not empty, then the protection is installed.
If it does not exist or it is empty, then the protection is not installed.