Dual boot doubt

[acb2000]

Hello, I have a doubt about dual boot.
I have a old, really old, acer computer. It came with Windows XP but it was painfully slow and the computer taked literally 20 minutes just to start. Because of that I decided to install ubuntu on it. At that time I decided also to leave Windows on the computer because I was giving it to my uncles and I tought that they would want to use Windows from time to time. But I was wrong, they never used Windows and only ubuntu. My doubt is, now that I've installed ubuntu in dual boot with Windows, can I remove Windows completelly without the need to reinstall ubuntu?

Thanks! :D

[Mark Phelps]

If you truly have Windows and Ubuntu installed in separate partitions, then you can do the following:
1) Boot into Ubuntu
2) Launch GParted
3) Use it to reformat the Windows partition -- to use it for data storage
4) Open a terminal and enter "sudo update-grub". This will regenerate the GRUB config file, and since only Ubuntu will be on your PC, it will boot directly into Ubuntu after you reboot it.