xlock: command not found. Tried Find Files and Folders, both for filename and content--not there.
As to the screensaver command, I don't think this is what I'm looking for. I don't know what causes the widgets to move arbitrarily or exactly when, but
locking the screen 10 minutes after the screen blanks probably will not help, and having to use a password to open it up again would be a pain. I need
something like the Windows freebie, Desktop Save and Restore--I think that's what it's called. (When you have all the icons placed where you want
them, you right-click on the desktop and say save, and if they ever move, or even if you move them yourself by accident, then you right-click again and
say restore, and all goes back to the way it was.)
(BTW, I've been using pclos since mid-2010, and I never saw this behavior until quite recently--it must be an artifact of something that was upgraded.)