A bit more information needed - what Operating System like XP/Vista, what is the 'something' that appears for about five seconds, how long has this been going on, and tell us about your computer - is it laptop or desktop, what RAM has it got etc.
Xiaomi Mi Mix 2 review
What went wrong at the Designs of the Year 2017
iPhone X news: Release date, price, new features & specs
Comment créer, modifier et réinitialiser un compte Apple ?