As of 3/31/2012, there are still crashes from HotSpot Shield. Just mentioning because if you haven't uninstalled it yet, it will continue bsoding the machine. If you did remove it, everything is well since it hasn't crashed since 3/31.
You can use CCleaner to delete the minidumps if you wish. It's the "Memory Dump" option.
As for switching account to local, try a different user name.