When I isolate a layer or turn off a layer from the icon command, it works. When I hit the icon for "turn on all layers" to get back, the layers that were isolated or turned off remain ghosted and the work I did is lost since I have to hit undue to get all my layers back on...? This was not a problem in AutoCAD 2000 I used for years before getiing LT 2008.
You would rather UNDO and lose all your work than
simply turn on the layers using LAYER command? Really? Was that the only
solution you spotted, undo??? That's a self-inflicted problem.
REGEN may have been able to refresh your screen and
turn on those layers: you have have frozen instead turned off layers too, or
frozen layers inside viewports. Get into LAYER command and see what is
actually happening and why.
And stay away from UNDO as the solution for Pete's
Your original post lists two commands to 'hide' a
layer, and two commands to 'unhide': these are two separate functions and from
your description of your final fix I suspect you may be mixing and matching. Not
a good idea.
Installation and registry cleaners can generally be solved here in this discussion if you want to persue further. You may even want to post the macro for your LAYUNISO from your CUI to make sure it has not gotten hosed up somehow.