Nijak (po tom "odobrati" by totiz nefungovalo nic).
Windows mozes preinstalovat, u novsich notebookov je idealne pouzit vstavanu funkciu recovery (obnovy) Windows. V navode mas napisane co mas mackat aby sa to obnovilo na vyrobny (factory) stav. Predtym si zalohuj svoje data mimo notebook (DVD-R, externy HDD, apod)