SEP 12.1 - Windows 7 Install Failing

Hi,

I am trying to install Symantec Endpoint Protection (12.1.7004.6500.105) onto a PC running Windows 7 Enterprise (SP1) 64 bit.

When I run the installer it takes a while but eventually shows the Windows Installer, which then eventually disappears and that's it.

I am logged in as an Administrator, have tried using CleanWipe, and have tried turning off Defender also. I have attached the SEP install log.

Any help would be much appreciated!

Thanks,

Jack