I was wrong. Nothing's fixed and the freezing is back. Thanks for everyone's help, but I must give up on linux. I will keep the installation on the partition to visit, but I need something more reliable.
Well, I tried again and all seems to be working.
I'll admit many of the problems were probably of my own making - installing things that were not in the software center (themes, utilities), doing stuff in the terminal that I got of the net, mostly to try to get flash to work.
Now I have LXLE (ubuntu 12.04) installed and have gone over 24 hours with no problems or reboots. It has everything I need, looks nice, and with the qshutdown app I have suspended about 20 times with no problems - a sure freeze previously.
Newbie advice-
If it is not in the software center - forget it.
For flash on old machines - search for flashplayer archives, download (save) old version (11.102.62?). Use software center to uninstall flashplayer, extract the old version, and copy and paste it into the mozilla plugin folder. If you are as new as I was, post a request for detailed instructions.
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