How to Update Windows 8 to Windows 8.1

Before you begin: backup your system 

Ready? Now you can download the free update from the Windows Store.

1. Go to the Start screen, and tap or click the Store tile.

2. In the Store, tap or click the Windows 8.1 or Windows RT 8.1 update. if you don't see the update on the Store home screen, see Why can't I find the update in the Store?

3. Tap or click Download.

4. The update will download and install in the background while you use your PC to do other things. The installer will check to make sure you have enough disk space, that your apps and devices will work with Windows 8.1 or Windows RT 8.1, and that you have all the required updates.

In some cases, the installer might find something you need to take care of before you can continue installing the update. If so, you'll see a message telling you what you need to do.

Note: If the installation is interrupted for any reason, you can restart the update from where you left off by going back to the Store and downloading the update again.

Restart

After the update is downloaded and the first phase of the installation is complete (which could take between 15 minutes and a few hours, depending on your system and your connection speed), you'll see a message telling you that your PC needs to restart. It will give you 15 minutes to finish what you’re working on, save your work, and close your apps, and then it will restart your PC for you. Or you can restart it yourself. 

 Note:

• If you leave your PC before it's ready to restart, be sure to save your work and close any desktop apps you're using to make sure you don't lose anything when it restarts automatically. Your PC might need to restart more than once, depending on how it’s set up, and whether additional updates are needed.
• Restarting will take longer than usual—from 20 minutes to about an hour—while the update is applied. During this time, you won't be able to use your PC.
  
  

  Choose your settings

  Express settings

  You'll see a list of recommended settings, called express settings. To accept these settings and continue, tap or click Use express settings. You can change any of these settings later, after you finish setting up. If you'd like to change some of these settings now, tap or click Customize.
  
  
  
  
  
  
  

  Sign in

  Next, you'll be asked to sign in. If you already use a Microsoft account to sign in to Windows 8 or Windows RT, your account name will be filled in for you. If you previously used a local account, you can still use it to sign in.
  
  
  If you have MS account then do login, if not then create.
  
  

  OneDrive cloud storage

  If this is your first time setting up a PC with Windows 8.1 or Windows RT 8.1, you'll see the new OneDrive options.
  If you already have another PC running Windows 8.1 or Windows RT 8.1, and you chose to sync settings on that PC, then your OneDrive settings will also sync from your existing PC to this one, and you might not see this screen.
  
  
  
  
  
   
  If you click Next on this screen, your PC will use these default OneDrive settings:
• Photos you take with this PC are saved to your camera roll folder on this PC, and a smaller copy of each photo is automatically backed up to your OneDrive.
• When you create a new document, the default save location is OneDrive. But you can always choose to save individual documents locally or on another drive.
• Windows will save a backup copy of your PC settings to OneDrive. If something ever happens to your PC and you need to replace it, your settings are saved in the cloud and you can transfer them to a new PC instantly.

You can change any of these settings later in PC settings. If you'd prefer to turn off all of these settings now, tap or click Turn off these OneDrive settings (not recommended).

Welcome to the new Windows

For more info Please click here