AT A GLANCE
Windows 8 isn't for everyone. If you're mostly a desktop PC user comfortable with Windows 7, upgrading to Windows 8 is probably not worthwhile. If you're a mobile user who needs easy access to the complete Microsoft ecosystem, including SkyDrive, Windows 8 is definitely a good fit. If your needs lie somewhere between those two extremes, give Windows 8 a close look; the cost is low, but you'll need to learn your way around the new Start screen and make sure that your existing software runs well in the new OS.
MANUFACTURER’S DESCRIPTION
Windows 8 is built on the rock-solid foundation of Windows 7, but it's been improved on all fronts. You can install Windows 8 on the same hardware that powers Windows Vista and Windows 7, and you'll love how it works on new devices, too. Windows 8 was designed with Windows 7 apps in mind, because you probably have older apps you need to use
Windows 8 System Requirements list as bellows, check this Windows 8 system requirements, see if your computer can run Windows 8 or not.
1 gigahertz (GHz) or faster 32-bit (x86) or 64-bit (x64) processor
1 gigabyte (GB) RAM (32-bit) or 2 GB RAM (64-bit)
16 GB available hard disk space (32-bit) or 20 GB (64-bit)
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