My Asus Vivobook was taking 10 mins + to boot and several minutes to load programs etc.making it virtually unusable. Numerous resets, diagnostics etc. didn't work and I was about to cut my losses and sell it for parts. I did some research and tried one more thing....Eureka! The laptop came with McAfee preinstalled and it was clashing with my own Norton software. I completely removed the McAfee and now have a speedy, fully working laptop. The best option is to use the [I]McAfee Removal Tool[/I] (Google has the tool and info). Don't rely on the windows uninstall, you have to remove every trace of McAfee.