Windows 7 is available on new PCs, but you also can buy it for a computer you already own.
- First you would want to run a software exam called the Upgrade Advisor to see whether your machine has enough memory and computing power to handle Windows 7. It's available here: http://bit.ly Most computers running Windows Vista should be fine for Windows 7.
- If your PC passes the test, then you'd need to choose a version of Windows 7. You would pick from Home Premium ($120), Professional ($200) or Ultimate ($220). (Big businesses can also buy an even more feature-laden version, Enterprise.)
- For most people, Windows Home Premium will be fine. Microsoft will sell the software as a download on its Web store, but copies on discs are stocked at electronics retailers and available from such sites as Amazon.com.
- Make sure you buy a copy that's compatible with your PC's microprocessor. There are two flavors, 32-bit and 64-bit. Microsoft offers help in figuring out which one is right for you: http://bit.ly
- The Associated Press