Uninstall Symantec Endpoint Protection without a password

Dear all, I installed Symantec Endpoint Protection on my client’s computer (Windows XP), which has slow down the boot up time and annoying virus detention alert every time when access the network drive.

I wanted to uninstall it but is asking password which I don’t have. Anyone has the same problem? Any ideas?

*I tried to terminate or bypass the password window but with no success!

Thanks for any inputs!