Installation Problems of Ubuntu 8.10 Desktop Edition

[ps_20080]

I have
Microsoft Windows XP
Professional
Version 2002
With Service Pack 2

My Hardware
Intel(R)
Pentium(R) 4 CPU 2.40 GHz 256 MB RAM but Gives at max 253 Ram

I installed Ubuntu Inside Windows
Windows is in C Drive And i installed Ubuntu in D Drive(9 Gb Free Space)

I entered to install 4 Gb Program of Ubuntu.Then it copied and created images and told to take out the disk and reboot automatically.

Then in dual boot i selected UBUNTU and for 2-3 mintues it was loading (The WALLPAPER was just so cool) and finally came up a window showing Checkinh installtion and when it was near 50% lights went off and My UPS had very little so i turned Computer off Directly.

Then when lights came I again selected UBUNTU,Then it checked Installation and Partation,Etc. Then I went to get water for my self and then there was a yellow background and small circle mouse pointer with 1/4 circle Darkened with line.The computer hadn't hung up as i could move mouse , then i left the computer and came after 20 mintues still the same situation.

What should i do now?

[abn91c]

press ctrl+alt+f1, at the prompt type these commands one at a time, the problem it the desktop effect that ubuntu loads by default
sudo apt-get remove compiz
sudo apt-get remove compiz-core
after they are done sudo reboot

[ps_20080]

When to press in windows XP or Ubuntu?

[abn91c]

When to press in windows XP or Ubuntu?
ubuntu