ok so I bought a used Compaq Presario SR5027CL Desktop. When I turned it on and logged onto the administrator account the screen was black and there were no icons. When I went to the task manager it showed no processes running. My buddy who is way more Tech than I am, told me I need to do a system recovery and ordered the cds for me. After going through the basics of insert this cd then that one the computer restarted itself (normal as far as i know) to a black screen that says NTLDR missing Press Atl+ Ctrl+ Del to restart(not so normal?). What Do I Do Now? Google search took me to several different tech sites which talk about all other OS except Vista. Any help that works would be appreciated.