Boy, do I feel dumb. I recently had problems after upgrading from 2010 SP1.0 x64 to SP 2.1. system hangs during all sorts of operations... save, rebuild, configuration changes. After a week I contacted my VAR and they instructed my to perform a clean install then sent me a PDF with precise instructions. I "Did all that" but the problems continued. So, each time I would jump into the Regedit and dump the HKCR\Software\Solidworks\Solidworks 2010 then restart the system then restart SW then use the "copy settings wizard" utility to get up and going quickly.
Has anyone looked into the file: "swSettings.sldreg"? Well, I finally looked at it and realized I was re-introducing all of the problems into my "clean" system... all kinds of registry edits directing SW to look for non-existing files. aaarrrrggghhh
So, now, after a clean install and taking the time to remake the tool bars, locate templates and all the other preference choices my SW is stable. Days of lost time. So, learn from my dumb mistake and avoid using the "copy setting wizard" unless you REALLY understand what is being copied.