You don't say what your os is but assuming you have xp or later have you tried pressing F8 as it boots and, instead of repair, select 'Last known Good Configuration.'?
Can you remember what changes you made prior to this happening?
Alienware 17 R4 2017 review
Illustrator Sylvain Tegroeg created thousands of intricate line drawings for the mobile game…
Best iPad buying guide 2017
Comment télécharger une application indisponible en France ?