Ok, i installed a keygen (idk it is have viruses) and when i open it nothing happened, only loading 10 min loading.. i uninstalled after i wanted a restart, after the restart bam lag everything, games browser windows... here a video https://www.youtube.com/watch?v=JTcTlNr8hUU&feature=youtu.be , you cand se lagging everywhere.. can i resolve it, or i need to reinstall the windows with dvd?