linux with ubuntu 10.04 system frozen while upgrading to Ubuntu 11.04

I was trying to upgarde  to ubuntu 11.04 and all was going well when I left the room and when I returned the screen was frozen. I do not know what phase it froze in. There was no mouse cursor, so I rebooted and all I get now is the ubuntu screen with a message at the upper right corner saying this.
Install problem
The configuration defaults for GNOME power manager
have not been Installed correctly. Please contact your
computer administrator.
I am the administrator, but since there is no mouse cursor,  I am lost, let alone I do not know what to do.
I do not know what to do to try to correct this problem and I am new to ubuntu and still trying to learn it.
So is there a w2ay on booting up that I can press a key to get me to where I might be able to do someting????

 Thankl You pupuli
pupuliAsked:
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Pierre FrançoisSenior consultantCommented:
You can normally select recovery mode when you reboot. I hope your system shows you the GRUB bootloader screen where you can select the recovery mode. Be sure the installation CD is removed.

After selecting the recovery mode, which is going to work in command line mode, you will have other dialog where you have to choose for a root shell prompt, as far as I remember.

Free space on your disk with command (as root):
apt-get clean

Open in new window

.

You can even free more space removing older kernels. See article: http://www.experts-exchange.com/OS/Linux/Distributions/Ubuntu/A_5166-How-to-suppress-older-kernels-in-Ubuntu-in-one-command-line.html

Now issue next command (as root):
apt-get --fix-broken

Open in new window

This should make the system usable.
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pupuliAuthor Commented:
To pfrancios,
                    Well just for the heck of it I put my ubuntu cd inthe drive and started the pc
and a window came up asking me if I wanted to install ubuntu 10.04 LTS. I clicked yes and then another wundow popped up telling me that there was also ubuntu 10.10 inthe pc and if I wanted 10.04 installed next to it. I did not even know I had 10.10 cause I had thought I had installed 10.04 before. So I said to remove 10.10 and use the entire disk to install 10.04 and now it is in the process of installing ubuntu 10.04 LTS.

I will let you know if the installation completes and if everything turns out good.


pupuli
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pupuliAuthor Commented:
Your comments made me put the ubuntu 10.04 LTS os cd into the cd-rom and that started the system to strart insta ubuntu 10.04 Thanks....pupuliiing
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pupuliAuthor Commented:
pfrancios,
                  I  must not have closed this question and I thought I did, cause I on your post 2012-03-25 at 11:58 there is a green accepted solution check. On my last comment I stated I put the ubuntu 10.04 LTS cd into the CD-Rom drive and it started to install 10.04LTS again and all went well.

Thanks again....the reason for this comment is I got a email from a moderator that my question was still opn..hopefully this closes it....  pupuli
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