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- The 64-bit Windows architecture can only be installed on computers with a 64-bit capable processor. When running 64-bit Windows, all device drivers must be 64-bit. 64-bit Windows can run 32-bit software using a 32-bit subsystem, although some 32-bit applications are not compatible with 64-bit Windows. 64-bit Windows does not have a 16-bit subsystem and does not support 16-bit applications. ................
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