This is how you will get windows 8 upgrade version for 15$+Tax.
It's easy and simple
Go at http://windowsupgradeoffer.com
Yes I know, you think it's for new PC only.
But your wrong, It's not, believe me.
Now that you are on http://windowsupgradeoffer.com
Fill everything with what you want,
Now choose your PC : For this and for all my 3 pc I did this but i'm sure something else will work
For the date, write that you buy the computer last week, or yesterday, (maybe something else will work)
Go to walmart.ca chose a laptop brand. Write walmart at Name of retailer *
chose at PC Brand * Ex:HP now copy paste the model of the pc and write it at PC Model * ex: 2000-2a09ca
Now finish the subscription.
You have now received a mail from microsoft
Follow the instruction.
I payed with paypal
You don't have to install on the same computer that you are running this Wizard. Once the download is complete, it will give you the option to burn it to DVD or USB drive. So, you can do a clean install.