Newly installed Mac Mini legally upgraded to Mountain Lion is unstable
Newly installed Mac Mini legally upgraded to Mountain Lion is unstable 2.4Gh Dual, 8Gb RAM. Had to repeat initial install three times, then would not shut down. Reinstalled, seemed better, kernel panics happening and restarting, removed 3rd party devices. Zapped PRAM and fixed file permissions.
Any ideas welcome.
Mac mini, OS X Mountain Lion