We already know that Microsoft will make available Windows 8 upgrades for $39.99 regardless of the version of Windows XP, Vista or Windows 7 that is the upgrade being bought for. And while this appears to be a promotional offer that is valid until January 2013, it is likely that upgrade prices won’t increase much afterwards.

Customers who bought an eligible PC with Windows 7 get an upgrade opportunity for $14.99 or even for free, depending on the PC that they have purchased.

What we did not know yet was how much Microsoft would be charging for retail copies of the operating system. While many assumed that the price would be below $100, no one knew how much below it would turn out to be. A leaked screenshot now suggests that Microsoft will charge €59.99 for a digital Windows 8 Pro version. If you convert the Euro price into Dollar you end up with roughly $75 if Microsoft is using current exchange courses. It can very well be that customers from the US will pay less than that, as it is quite common that US retail prices are converted 1:1 to Euro.

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