I have never had this happen with any other operating system on any of my computers in any time of my computer experience, but this is what happened to me during the past 2 weeks. I had one laptop with me while I was out of town. I allowed it to update, and suddenly found that Windows was reporting my system as an illegal system. In spite of hours of attempts to fix this with the assistance with Microsoft support, it could not be fixed. The only solution? "Refresh my system" mode, which basic comes down to a complete new install where you lose all the software that you have previously installed. A complete utter pain which I am still dealing with. "Refresh" might as well be replaced with "Your system is trashed, time to start all over again". I got home and opened my other laptop with Windows 8 I went on line where Windows Update installed new updates. My 2nd laptop will now not restart. Windows lost all system restore information. Windows will not even allow me to refresh the drive, reporting it as locked. I still have another Windows 7 drive which I will now install so that I can recover my personal files before I completely wipe my hard drive and start again. I do not think that this speaks very well of Windows 8 or of Windows Update. I do not consider this a failure on the part of Windows support as the technician did everything that he could do to assist me. Both computers were virus and trojan free. The microsoft tech even managed to run his own in house virus scanner on my pc to verify this. I manage and upkeep all of my computer systems to much higher standards than just about anyone that I know. I have Ubuntu Zorin on another computer. Even when some poorly designed software was installed it continued to boot and run and eventually completely repaired itself without my assistance. I am really a 'Windows' person so the robustness of Ubuntu Zorin can not be explained by my mastery of that system. I have been able to save every other Windows operating system that had developed problems without having to wipe the system. Windows 8 is the first to force me to do this.