Despite the fact that everybody is linking to Wal-Mart’s OS-free computers, all the links I’ve seen so far are missing an important point. These computers with no OS illustrate to consumers exactly how much Windows adds to the price of PCs. As the prices of PC components have gone down over the years, the price of Windows has gone up. You can buy the hardware for a pretty kick ass PC for less than $500 — purchasing the home edition of Windows XP adds a good 20-25% onto the cost.