Laptop goes blank

troy44 Posts 15 Registration date Sunday August 25, 2013 Status Member Last seen March 31, 2015 - Apr 9, 2014 at 06:37 PM
hi guys, i have a dell laptop and never had problems. lately when im on internet then my screen goes black for a second and then it comes right again. my pc is also slow and i defragmented more than once and always get rid of clutter but it doesnt seem to go faster. your help will be much apreciated.