PC user since 1992.  many Models many versions from DOS to Windows 3, Windows 95 all the way to Windows 10 which is the current model that I have. I've had laptops desktops and everything and never had a problem never had  to any repair never had to have any replacement. This computer, however, has been endless endless endless problems. Had to take it to my local repair man twice when I couldn't do anything myself which is fairly extensive. Now, not that day goes by and some mysterious errors, weird events etc. arise several times a day forcing me to reboot over and over again. When it works it is fantastic brilliant I love. But all this constant errors is a major headache. I cannot find anything error checking tool for the computer I do regular cleanup  CClean, & defrag. I update every time there's an update. Most recent adventure to the repair shop required a complete reinstall of Windows and even after that there are constant problems. It is now well past time of return. All my previous computers that I bought a refurbished came from New Egg or Tiger Direct. There were excellent never any problem. I will never recommend this. From now on I stick  with New Egg. BTW Price came WAY down I paid 500.Recent observation: My usual practice was to it it in sleep mode at end of day, BUT NOW when I go to reboot the system was turned off overnight with my apps shut down. also takes much longer to boot.