I wanted to change the name of the server in the "Provide Computer Name and Domain section of the Initial Configuration Tasks page.

I made the mistake of starting to change the description (first screen) rather than the server name (second screen) so I removed the two characters I had typed in there and then went on to the second screen.

Only to find that I could no longer remove the server name in that screen nor could I type in any characters to that field.

I tried backing out with Cancel and then re-accessing "Provide Computer Name and Domain" and then going directly to the second screen and I still couldn't type in a new name for the server. I also tried this after adding a description in screen one - still no entry of characters in screen two was possible.

In the end I was forced to re-boot the server. Then when I went to "Provide Computer Name and Domain" and didn't enter the Description field but went directly (with "Change") to the second screen, I could enter my new name (MOSSSP1).