hey guys, m back...
was busy the past few days, didnt get time to work on this...
also, i had to format my Windows today, my PC seemed to be behaving weirdly...
the problem is, after formatting and re-installing, the boot-loader entry of Ubuntu dissapeared... PC now directly boots to windows, no OS Choice Menu...
i wonder if somebody could help me out here...
look here:
https://help.ubuntu.com/community/RecoveringUbuntuAfterInstallingWindows