I'm home now, and thank you two, rjm65 and PCNetSpec, for your help with Flash on that old computer.
Since MATE was acting up on that old computer, I installed Lubuntu. But, boy, did I notice a difference with speed. Relatively speaking, MATE flew on that old computer, but Lubuntu seems pretty slow.
I wonder why LXDE is slower than MATE-- at least on that old computer. Of course I'm also wondering why MATE froze on that old computer, so much so that it had to be turned off by a hard shut down.
