Can't use Linux Lite 2.0 Updates (new user)

[gold_finger]

BTW, I'm wondering if perhaps I used an incomplete copy of LinuxLite 2.0.

No -- if that were the case then it would never have installed at all.  You're fine.

I tried to do what you've suggested.  When I got into Synaptic Package Manager, it gave me the following error message:

E: dpkg was interrupted, you must manually run 'dpkg --configure -a' to correct the problem.
E: _cache->open() failed, please report.

Could you please suggest what to do from here?

Looks like maybe the updates you downloaded before did not fully finish installing themselves.  Go ahead and do what message says by opening a Terminal and entering the following:

Code:

sudo dpkg --configure -a

If it does its thing and does not spit out any error messages, then go ahead and try installing with Menu -> System - Install Additional Software.  It will probably work now without bothering with steps outlined in my last post.

If you get error messages from that command, post back a copy of the terminal output for us to look at.