Other questions in this vein have not really addressed the issue or were so technical that I didn't know if they addressed the issue or not. Here is the problem: my WiFi was connecting just fine until last update (can't tell you which one because I am using Windows to send this). Now it is hit and miss. Sometimes it connects right up and other times never after repeated attempts. Seems to center on rejected password for WPA. My system is dual boot, so the Wndows7 connects just fine. I try using earlier versions of Ubuntu from the GRUB selection on boot, but it doesn't seem to make any difference. I have uninstalled and reinstalled the Gnome Network Manager and Wicd. With no effect. I can do simple command line operations but get totally lost and frustrated with elaborate and uber-technical fixes.
By way of editorial comment, I have had this issue with Mint, SUSE and now Ubuntu. Seems to be a real weakness in Linux distros. Otherwise I absolutely love Ubuntu.