Thanks for answering.
I downloaded the update from the site I have had for a long time.
I hate to be so unknowing but I do not remember ever seeing a (LOCK) anyware??
Is there a way I can test this out??
As for (b) & (c) I don't remember seeing anything like that either.

If you haven't seen those bogus updates, that's good. I've never seen an official update (with a padlock) either...so AFAIK there's no way to test this out.

I'd say just make sure that you keep on downloading LW from the official site. If you visit the LW site every once in a while, you'll see when there's been a version update

Just keep the other info in mind, in case you see some dodgy files in the future!