Greetings Guys, Could anybody tell me why this problem is going on! I have Msi laptop , when i use Lodder v2 to activate it work's fine until next restart . after i restart or try to use next time then it tells me BOOT MGR missing ( theres no problem on it ) i will solve the boot repair problem . but... after i solve the boot repair problem & restart pc again then Black screen tells me " Missing operating system " ?? Actually until today i installed win7 for more than 10 times in 2 weeks why this problem comes again and again ?