BOOTMGR is missing... I attempted to install Windows Vista and Windows Vista had an error occur and could not install... I waited 30 mins for it to exit the install but it never did... Consequently, I restarted the computer... Ever since then I get this message... "BOOTMGR is missing..." "Press CTRL+ALT+DLT to restart." Everytime I do nothing happens... Same message. What do I do??