start up repair problem

I just did windows memory diagnostic test. Nothing happened. I got the same page with two options
1. Launch windows repair
2. Start windows normally.

I ran the test. I again get blue screen with cursor when i select launch windows repåir. I can not even right click...how to delete this windows completely as set up never ends when i boot with windows cd??

I forgot to write tht The memory diagnostic test did not find any errors.

Couple of questions to try to better assist you with a clean install. First, what kind of installation media do you have? Is it a full install disk or an upgrade disk or a manufacturer's recovery disk? Second question, is your BIOS set to boot from your optical drive first?

i have full installtion disk. when i instll disk i get option boot from CD or Dvd

After booting from the CD/DVD do you see a black screen that says "Press any key to boot from CD" and do you press any key like the space bar or shift, etc? If yes, what happens next?

yes, when i press it says windows is loading files, it loads and then i get option to choose keyboard language etc. when i click next setup starts but it keeps on runing for hours.

There's a couple things that can stop a computer from finishing a clean install (or taking hours to do it.) It could be a bad installation disk or the disk got damaged in some way. Or a hardware problem like a failing hard drive. Could you post your system specs for us? At the top of every Forum page is a "User CP". Click on that and in the left column click on "Edit System Spec". Fill in as much info about your computer as you can.

Also, did your computer come with Windows 7 pre-installed or did you upgrade from Vista or XP? If it came with 7 when did you buy the computer and from where? (Warranty may still be good.)

I'm going to be away from my computer for about 2 hours but others may jump in with some more suggestions.

Ok. I edited my computer specifications with what I knew. My computer came with windows vista but I deleted it and installed windows 7 about an year ago. My laptop was bought in 2008. It's been working fine since then.