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Windows Vista Business supports up to two physical CPUs, [18] and the 64-bit version supports 128 GB of RAM. [19] Windows Vista Enterprise This edition targets the enterprise segment of the market: it comprises a superset of the Vista Business edition. Additional features include BitLocker, Multilingual User Interface (MUI), and UNIX ...
As a result, the decision was made to postpone the introduction of UEFI support to Windows; support for UEFI on 64-bit platforms was postponed until Vista Service Pack 1 and Windows Server 2008 and 32-bit UEFI would not be supported, as Microsoft did not expect many such systems to be built because the market was quickly moving to 64-bit ...
The options to use the legacy renderer, overlay mixer, video mixing renderer (VMR-7) or high quality mode (VMR-9) are not available in the Windows Vista version of Windows Media Player 11. The Windows Vista version can use only the Enhanced Video Renderer (EVR).
For security reasons, 64-bit versions of Windows Vista allow only signed drivers to be installed in kernel mode. [1] [2] Because code executing in kernel mode enjoys wide privileges on the system, the signing requirement aims to ensure that only code with a known origin executes at this level.
On June 6, Microsoft extended the availability of Beta 2 to all users, making Vista available as a free download in several languages from their website. Some technology websites described this release as "the largest download event in software history". [37] In June, Microsoft made two significant changes to its plans for Windows Vista.
Vista implements address space layout randomization, that makes it considerably more difficult for malicious code to exploit Return-to-libc attacks than on previous versions of Windows, particularly on 64-bit systems. Furthermore, Vista implements heap management enhancements that make it much more difficult to carry out buffer overflow attacks ...
Mac OS X 10.4 "Tiger" and Mac OS X 10.5 "Leopard" had only a 32-bit kernel, but they can run 64-bit user-mode code on 64-bit processors. Mac OS X 10.6 "Snow Leopard" had both 32- and 64-bit kernels, and, on most Macs, used the 32-bit kernel even on 64-bit processors. This allowed those Macs to support 64-bit processes while still supporting 32 ...
Kernel-mode drivers on 64-bit versions of Windows Vista must be digitally signed; even administrators will not be able to install unsigned kernel-mode drivers. [20] A boot-time option is available to disable this check for a single session of Windows. 64-bit user-mode drivers are not required to be digitally signed.