Hello, I have just purchased new laptop of HP, having pre-installed OS as Windows 7. But i dont have DVD in case if i want to install OS again. I did when i was using XP earlier but now i dont know how to manage here. Could anyone please let me know how can i create BOOTABLE BACKUP of Windows 7? So i can keep that DVD with me and i can use it anytime, if something goes wrong with my OS. Thanks..