Solaris

I recently installed Solaris 10 onto an HP desktop and was able to get it running without any major problems. I then installed Sun Studio 11 on the same machine, and was able to run it up as well.
I didn't lock the monitor when I left the room and my 1.5 y/o grandson (who likes to play with keyboards) thought that he would help me out I can no longer log into the system (as root - no other user had yet been added), all of the keys on the keyboard are offset when typed (i.e. "r" is "e", "o" is "i" and "t" is "r"). I am perplexed as to how to go about recovering from this, so I would like to try to reload everything. I am also getting error messages indicating "Disk Full". He really did a number on my PC
How would I go about removing what is installed now and reloading it over again. Or, can I simply re-install Solaris (and it will over-write existing files)?

Thanks in advance.
PS - I will be making it a habit to lock the terminal at home - I have to do it at work.

If you're happy to re-install you will be given the option of preserving or over-writing the existing install. Choose not to preserve and you'll have a fresh build. I'd recommend you increase the default partition sizes too. The default partitioning is the minimum required but if you have space on your disk, re-assign some extra space to / and /var.
Hope this helps

Thank you for telling me what I wanted to hear! I was afraid that it would not give me the option of overwriting the existing installation (too used to MS, I guess).
I also noticed that there appears to be four partitions on the current drive, two of which appear to be Unix (one is Solaris, can't remember what the other one is), and there is also two other partitions of which I can't remember the names (neither is "swap").
I am hoping that I can increase the partition size (maybe delete the two that I don't know what the names are) when I do the re-install.
Thanks again for the confirmation!