If you’ve gone PC shopping lately, you've probably noticed more computers with 64-bit processors, and you may have wondered what advantages they offer.

Put simply, a 64-bit PC can handle larger amounts of information than a 32-bit system. Since it can use more RAM—4 GB and up—a 64-bit computer can be more responsive when you're running lots of programs at once.

Which should you buy? If you tend to have a lot of programs open simultaneously or need to switch frequently between programs—or if you just want to be sure your PC can take advantage of the larger amounts of memory available today—64-bit is a great choice. If you run only one or two programs at a time or have older hardware and software that isn't supported by a 64-bit PC, a 32-bit system is a good choice.

Whether you choose the 32-bit or the 64-bit system, Windows 7 is ready. To see if your PC is a 32-bit or 64-bit system, download and run the Windows 7 Upgrade Advisor.

You can also visit the Windows 7 Compatibility Center to see whether your programs or devices are compatible with the 64-bit version of Windows 7.

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