Upgrade to windows 8.1

How to upgrade to windows 8.1 (the free upgrade to windows 8):

Steps:

1. Consider the implications, this in a major operating system upgrade and shouldn't be taken lightly for existing PC's. Installed apps, personal customizations, device driver compatibility among other things can all be protected by taking a simple imaged based backup with a product like Acronis drive image before continuing, continue without backups at your peril. For a new PC that was shipped without the 8.1 update do the update before you install too much software or customize.
2. Go to the store and see if the update is available (see Images below for the store icon and the "update to windows 8.1" item

Store icon:

Update to windows 8.1:

1. If the update is not available in the store then install all the available updates for windows restart as prompted and check back in the store. If it's still not there give it a day or so and check back again.
2. Once the update is available and once you have 3 or 4 hours available when you wont need your PC to install the update form the windows store. Bear in mind that this up to a 4GB download so make sure you have the internet data available to be able to do this without incurring excess fees, plug into mains power and let it go. I suggest you do this at 6pm one evening so that it can download and then you can press install later in the evening and allow it to do the actual upgrade overnight.

One final consideration is that it may prompt you to store your data on Microsoft SkyDrive by default as part of the initialization process, unless you have a particular desire to do this make sure you click no.