Computer freezes after software install

Question

after i updated to the newest version of snow leapord my computer will freeze/and or restart during use. also, i now cannot access my system prefereces. what does all of this mean?

Answer 1

Ah, so Genius!.
You'll have to follow this procedure
1: Hold the command and r keys down and boot the machine, you'll enter Recovery HD partition.
2: Use Disk Utility, select your Macintosh HD partition and erase with the middle erase option (important!)
3: Go have a beer and watch TV, it will take some time to finish.
4: Quit and Reinstall OS X, you will need a strong fast Internet connection, preferably a Ethernet connection to the router or modem (reset power on modem) and wait for that to finish.
5: Reboot and all should be well, setup with a different name and password, this will be your emergency Admin user account in case of any future problems you can log into this one instead of the one your going to transfer.
This should be fine at this point unless there is a hardware problem.
Take it to Apple.
6: Use a Firewire cable to each Mac (FW 800/400 adapter if needed) and hold T to boot the older Mac into Firewire Target Disk Mode.
7: In your Utilities folder is Migration Assistant, use it to transfer the users accounts of the older Mac.
8: Optional: Log into the first Admin you created on the new machine and turn the other users to Standard User, it's more secure for tiny bit more work, you will have to Software Update manually, enter your admin name and password a tiny bit more often than running always as Admin (less secure that way)