Upgrading Windows 8 to Pro with key only

I have a laptop with Windows 8. Recently I registered to Microsoft MSDNAA (or DreamSpark Premium) and can download and use Windows 8 Professional. I had problems with downloading Win8 files using Secure Download Manager (this is another issue. but it's not the point), but I obtained a valid key. Hence the question:

is it possible to upgrade from Win8 to Win8 Pro without loosing all data on pc, using just a key? My first thought was there may be some kind of Upgrade Assistant. But I don't know if it's even possible

Answer

You're going to want to follow the Add Features to Windows procedure as outlined on the Windows Website.

Add Windows 8 Pro Pack or Windows 8 Media Center Pack to your edition of Windows

1. Swipe in from the right edge of the screen, and then tap Search.

   
   

   (If you're using a mouse, point to the upper-right corner of the screen, and then click Search.)




2. Enter add features in the search box, and then tap or click Settings .




3. Tap or click Add features to Windows 8 and then do one of the following:

   
   
   
   

   • If you need to purchase a product key, tap or click I want to buy a product key online.

     
     

     Follow the steps to purchase and enter a product key.

   
   

   • If you already have a product key, tap or click I already have a product key.

   
   



4. Enter your product key and click Next.




5. Read the license terms, select the check box to accept the license terms, and then click Add features.

If you were running Windows 8, your PC will restart automatically and Windows 8 Pro With Media Center will be available for use.

If you were running Windows 8 Pro, your PC will restart automatically and Windows Media Center will be available for use.