After booting gets a black screen

give the solution from the link below a try

http://www.ubuntugeek.com/how-to-fix-ubuntu-10-04-lts-lucid-blank-screen-at-startup.html

I have tried changing the "quite splash" to "nomodeset" earlier & I got the following message;

(= =) Log file: "/var/log/Xorg.0.log"
(= =) Using config file: "/etc/x11/xorg.conf"
(= = ) Using system config directory "/usr/share/x11/xorg.conf.d"
(EE) Failed to load module "fglrx" (module does not exist, 0)
(EE) No drivers available

Fatal server error:
no screens found

xinit: No such file or directory (errno 2): unable to conect to X server
xinit: No such process (errno 3): Server error

Then according to the advice I got from ubuntu forum I did the following;

Code:

sudo apt-get update
sudo apt-get upgrade

Code:

sudo jockey-text

But so far no chance of getting the display it says;

GtkWarning: could not open display

I'm new to ubuntu/linux I don't know how to get in to boot menu again. So what I usually do is press power button in my laptop & at that point I get the ubuntu welcome screen & laptop shuts down.

Looks like something bad in the xorg.conf file. Since the X server should run in a default mode without the file, try renaming it and starting X.
cd /etc/X11
sudo mv xorg.conf xorg.conf.sav
sudo startx

If that brings up X, you can try to edit the saved xorg.conf.sav to eliminate the problem line. The default mode may not have all the capabilities your video card is capable of, but may still run.

Thanks for the assistance. I tried to do, but it seems bit advance for me. Anyway I installed as WUBI. Now it's perfect.