Microsoft today launched a promotion that discounts Windows 7 upgrades as much as 58% when customers also buy a new Windows 7 PC.

The deal, which was available Thursday from the likes of Amazon.com and Staples, applies when consumers purchase a new computer equipped with Windows 7 Home Premium, Professional or Ultimate.

Staples, for instance, will sell a copy of Windows 7 Home Premium Upgrade for $49.99, a 58% savings compared to the $119.99 list price, when buyers also purchase a new Windows 7 PC. Amazon, on the other hand, dropped the price of Home Premium Upgrade to $59.95, a savings of $60, or 50%. Under the promotion, Amazon also cut the price of Professional Upgrade to $115.99, an $85 savings (42% off) and Ultimate Upgrade to $139.99, an $80 savings (36% off) when customers ordered a new Windows 7 notebook or desktop at the same time.

More: http://pcworld.com/article/174174/