How can I uninstall and reinstall ubuntu from a dual boot system?

Question

I have attempted to remove Ubuntu from a dual boot system (Windows XP, SP3) by deleting partitions, using both the Ubuntu install CD and GParted. Neither worked for me; instead, all I did was manage to install a new version of Ubuntu each time. Now, I have 3 versions of Ubuntu and one of XP. Trouble is, I cannot boot up XP. Each time I select it from the boot list, a message appears briefly saying chkdsk needs to be run, but instead of running chkdks, my computer restarts. I can boot up Ubuntu, so I have a way of getting online, if that is needed to find a solution.

Answer 1

This will erase all data on your computer

1. Boot to a live CD. You'll know you are on the live CD because it will have an icon called 'Install Ubuntu' on the desktop and your username (whoami in terminal) is 'ubuntu'

2. Open GParted (looks like this: screenshot)

3. Right click on each line and select the 'Partition' Menu, then 'Delete' (screenshot)

4. Repeat until there is only one line left that reads 'Unallocated Space'

5. Click the Commit button (Green Checkmark), if you pressed the right one then this will appear

6. Once it is done, expand the details and make sure every action has a green checkmark, like this

If for some reason you follow each of the directions above and your computer still boots into ubuntu or windows then you likely have more than one hard drive.

Alternative method (faster)

1. Follow 1 & 2 from above.

2. Click the 'Device' menu, then 'Create Partition Table' (screenshot)