so i have a dell laptop , i used it for 4 months , then i turned on 'automatic updates' and after installing updates it restarted but wont start again , its stuck at system repair , using a windows 7 ultimate dvd i formatted the disks and installed windows , it installs normally but it stops after restarting , a box with 'windows cannot install windows , reinstall windows after restart' i press the 'ok' button and it start from zero .. i really need your help guys , i have a dell laptop with 4 GB RAM and 650 GB HDD .