I am an absolute beginner. Today I installed Ubuntu from Windows 7, then deleted Windows 7 using OS Uninstaller. I ran updates and restarted and got a "bootmgr missing" error. I can't get past it. How can I fix this? I've read about boot installer but wondering how I run it if I can't get to anything. Will burning it to a CD make it autostart? Sorry I'm so new to this. Any help is appreciated. Thanks.