Windows 7: How to remove failed windows installation

I was trying to install Widows 7 ultimate (32 bit) on Sony VAIO CS-14G laptop. But the installation was a failure. Error occured during process of expansion of packages during setup. Then i restarted and in the boot menu it was showing windows setup. when i entered, it messeged starting windows (like normally it says during starting of windows 7), and then it showed the messege "Setup cannot be completed" and the system restarted. I have following queries (Note: i was not using the dvd during above installation process and i was doing it from setup files copied on a different partition of hard drive. Now,

1. When I inserted the disc, clicked on Install . I got the following error:When i try to use dvd it gives messege "Load Driver: A required CD/DVD drive device driver is missing....."



2. Setup has created a drive called as X:

How do i remove the windows setup files and also from boot menu.
Ideas of repairing are also welcome

Did you backup all your data first?

Nop. But i have vista installed so i can still backup

1) Backup first.
2) Are you trying to Dual boot Vista & Windows 7?

yes.

Backup first.

http://www.sevenforums.com/tutorials...list-boot.html

Reformat the partition & restart the install.
Dual Boot Installation with Windows 7 and Vista