Hi Everyone,
I was using XP-Home along with Ubuntu (dual booting) in my laptop. At the booting screen the Grub loader used to show me like this-

• Ubuntu
• Other operating system

Inside 'Other operating system' I used to find 'XP- Home'. Oflate I installed XP-Professional and there I faced the problem. Now I cant see the Ububtu wehen the Laptop boots. Now in the booting screen it displays only two OS-

• XP-Professional.
• XP-Home.

The Grub Loader is not working I guess. While installing XP-Pro I thought it would come under 'Other operating system' category. Now I'm facing this problem. Is there any way to rectify this ? Do I need to work on grub loader or Boot file (of XP-Pro). How can I force XP-pro to recognise the Ubuntu's presence. I need my Ubuntu badly and I dont want to reinstall it as it would mean data loss !
Please help me. Thanking you in anticipation.

Windows does not recognize any OS other than Microsoft, and removes anything non-MS with extreme prejudice. In this case, it overwrote the MBR of your disk, purging GRUB from it.
Boot using the Ubuntu Live-CD into rescue mode (if available) and restore GRUB from there.

Hi pludi,

You are right. This problem can be solved with the help of LIVE-CD. I got a useful link which helped me to solve this. The link is - OpenSourceNuts.Com | Section-1

Thanks for your help .