Yes, from the HD. I have a laptop, the reason for paying the extra 100's to get the external HD version was precisely to avoid filling my built-in HD.

What installers?

The description in the manual does not correspond to what I see in the directories of the hard drive.

I'll try the renaming and running as admin.

No virus killer, didn't touch no firewall settings, no internet connection (too slow and unreliable here) so network card drivers are disabled.