[ubuntu] Grub Menu is not loaded after deleting Recovery Parition- Acer D257 Netbook

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http://ubuntuforums.org – I have an Acer aspire D257 netbook with dual boot- Ubuntu 12.04 and Windows 7 starter. Few hours back I was reading an article about deleting the recovery partition used by windows 7. I logged into windows 7 and formatted the 13Gb recovery partition using the software "EaseUS". New partition was created and it worked fine. When I restarted the netbook, acer start up screen is showed and the screen goes black after a while. The grub menu is not show. Did the windows 7 messed up the grub ? How to bring back the grub bootloader back? http://www.howtogeek.com/139710/remo...l-of-your-h (Hardware)