HT4245 Downloaded mountain lion primarily to use iMessage.

Cannot activate iMessage with my Apple ID and password. I know the ID and password are correct but keep getting error message "The server encountered an error processing registration. Please try again. Have tried deleting and reinstating iCloud and even reinstall mountain lion. Help appreciated.
Tek

Did you try & use the Installer disc's version of Disk Utility, from the booted installer? That runs from a utilities folder icon in the top menu bar of Installer, after booting into it. The first screen would be Languages, a default here would be english, unless you installed a different one. Then the Installer screen is like a Finder desktop.
You can start from the DVD by holding the C key down, or choose a volume with OS X installed from all that may appear if you hold Opt D and select one. But the Installer's version of Disk Utility unmounts the computer's OS X system so it can be repaired. You should be able to see if Disk Utility> first aid> 'repair disk' helps. And also you can run 'repair disk permissions' separately while booted in the Installer.
When done, quit Disk Utility, and look in the menu at the top to choose from a dropdown menu, in Startup manager to boot from the system in the Macintosh HD. If there are warning messages after trying all this, depending on what they are, you may have to see if you have a Hardware Test on the original disc media that was included with the computer, and start from that to use only the Hardware Test, to see what it says.
Perhaps the hard disk drive is getting worn tired after so many times around the corridors of read-write world?
Hopefully this helps somewhat.
Good luck & happy computing!

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