Cannot unzip or open Lightroom Catalogs

This morning, in order to make more space on my hard drive, I erased a number of older LR backups (standlone, desktop version).  After I did that, when I launched LR, it would not load....said something about catalog (.lrcat file) could not be found.

Fortunately, I had a backup of those catalogs I had erased on another drive, so I copied them onto my main drive.

I still received that message that the catalog could not be found.

I tried to open a new catalog from a catalog I had just made last night.  I started launching that catalog; however, after maybe 30 seconds, it stopped and said something about being unable to extract the .lrcat  file.  I tried to extract it in windows, but I received a message saying "Windows will not extract Zip file error code 0X80004005 Unspecified Error."

Another thing is that when I was trying to find the .lrcat files through LR, I did not see them (I tried multiple older backups).  This was with the option of showing "All Supported Files" as well as the option of showing ".lrcat" files.  When I choose the option to show "All Files," the .lrcat files do show, but that's when I get that error code mentioned above when I try to open them.

I tried this for numerous older catalogs going back to early this year.  I received the same error messages.

When I tried to unzip an .lrcat file from late December, 2017, that worked.  Unfortunately, it does not have the picture files and edits for the pictures I put into Lightroom in 2018.

I have found some links about that error code, some of which give different ways to fix it.  It's interesting that while I see a link from Microsoft on this error code, clicking on that link does not work.

Anyway, does anyone have any ideas what might be going on and how to fix it?  I'd sure like to relaunch the catalog I created last night....it sounds as if for some reason, the catalogs I backed up in 2018 might be corrupted in some way, although, given some of the solutions proposed on other links, there might be hope to recover those...just don't know which solution to use, however.

Thanks