Important: This 15-step tutorial will walk you through the entire process of updating your copy of Windows 8 to Windows 8.1, which takes about 30 to 45 minutes.
If you have a previous version of Windows (like 7, Vista, etc.) and want to upgrade to Windows 8.1, you'll need to purchase a copy of Windows 8.1 (Windows 8 with the 8.1 update already included).
As it states on the Windows 8.1 download screen you're looking at now, . Just wait until you see the notice about restarting your PC, as shown next in Step 5.
Note: Downloading the several GB Windows 8.1 update package may take as little as several minutes on a fast connection and if the Windows Store isn't busy, or could take as long as an hour or more on slower connections and if the servers are congested. For Windows 8.1 to continue installing, your computer must be restarted so the upgrade package can access files that aren't normally available to software installations while Windows is running.
Disable the real-time protection in Windows Defender.
You can do this from the Settings tab in Windows Defender, which you can access from the scan using Windows Defender prior to updating to Windows 8.1.
These suggestions are based on my years of experience troubleshooting and solving various problems seen during software installations, Windows updates, and service pack installs - all very similar to this Windows 8.1 update. They often sleep and hibernate, but are seldom shut down and started up from scratch.
The size of the download will differ somewhat If your edition or architecture is different than mine, but all will be several GB in size.Similar to the Windows updates discussion above, you probably don't want to see the first signs of a virus or other malware just as Windows 8.1 is trying to finish installing.Note: If you're instead using a third-party anti-malware tool, you can find out how to disable the real-time protection in that particular tool using this guide.In the first section, at least, they're very easy to understand.Here are the headings if you'd like to look more into them: On this screen, you'll find a number of preconfigured settings that you can accept as given or customize to your liking. You can make changes to any of these settings later from within Windows 8.1.Sky Drive is Microsoft's cloud storage technology and it's more integrated into Windows 8.1 than it was in Windows 8.I recommend leaving the settings as they are and tapping or clicking on Next to continue. The update from Windows 8 to Windows 8.1 is now complete!Important: You may see the above screen sit for a long while, maybe 20 minutes or more.Hold off on the reaction to force a restart because your computer appears hung, even if the hard drive activity light stays solid or is off.If you already see something you don't like, feel free to choose Customize and make the changes here. This is the Windows 8.1 version of a screen you saw after you installed or first turned on your Windows 8 computer.It is presented to you again due to changes and new options in Windows 8.1. Use the same password you use every day to log in to Windows 8.