In the old days we went to a local store and hoped that your Software available on a DVD in the correct language. Can Windows 8 be bought over the internet (which price then) and how does it work?
closed as not constructive by Sathya♦ Oct 26 '12 at 9:25
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Non upgrade costs: 99.99$ / 139.99$
Upgrade costs: 39.99$ / 69.99$
You can buy windows online as a download, depending on your region.
See here for the list of countries: Windows 8 Terms and Conditions
In my region I can get it from microsoft from here:
Clicking the download button on that link will download the Windows Upgrade Assistent which will walk you through the process of upgrading an existing windows installation.
Note that if you have purchased a PC with Windows 7 (or Windows 7 on its own) recently, you may be able to get the upgrade free from the place you bought it, or from windows via the Windows Upgrade Offer
If you don't own a version of windows you need the System Builder version, for example from here: