Dear Anyone !

I have a laptop Lenovo E320 with window 7 64 Bit installed.
I have ZA extreme Security version Installed in that laptop.
I tried to install Check Point Endpoint Security (CPEP) (a VPN Client) but i receive an Error message saying:
"You must uninstall Zone Alarm client before you can install Check Point Endpoint Security"

Why is that ?
If I uninstall ZA and then install CPEP - would I be able to reInstall ZA again ?
How is it going to effect my computer's protection ?

Thank you