So I wanted to upgrade from Windows XP to 7 on my Asus EEE PC 1000HE. I was using this guide (how-to-install-windows-7-or-windows-vista-on-physical-machine-without-dvd-media) as a reference. I created a new partition, opened the .iso in Daemon Tools, moved the contents of the .iso to the newly created partition, and finished most of the other steps. I formatted C: at step 14. After that, I restarted. Now all I can get on the computer when I turn it on is: BOOTMGR is missing. Press Ctrl+Alt+Del to restart. That's it. I'm not sure what I screwed up, or how. Please tell me I can fix this. I have no optical drive, so USB is the only option.