Windows 8 is the codename for the upcoming version of Microsoft Windows that follows Windows 7. It features a new Metro-style interface that was designed for touchscreen, mouse, keyboard, and pen input. It also adds support for the ARM processor architecture in addition to the previously supported x86 microprocessors from Intel and AMD. Its server counterpart is codenamed Windows Server 8. No specific release date for Windows 8 has been announced.
Windows 8 for x86/64 processors will run most software compatible with previous versions of Windows, with the same restrictions as Windows 7: 64-bit Windows will run 64-bit and 32-bit software while 32-bit Windows will run 32-bit and 16-bit software (although some 16-bit software may require compatibility settings to be applied, or not work at all). Windows 8 on ARM processors (WOA) will not support running, emulating, or porting existing x86/64 desktop applications.
Metro applications will also be cross-compatible with both x86/64 based systems and Windows on ARM.
Windows 8 开发者预览版 试用序列号：