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Windows Vista uses Package Manager (Pkgmgr.exe) and Windows Update Standalone Installer (Wusa.exe) to install software updates and hotfixes. However, these do not support the various command-line switches like Windows XP's Package Installer (Update.exe) did. [84] Much of the functionality from Update.exe is missing.
It is not possible to run the 32-bit version of Windows Explorer as a file manager or as the shell in 64-bit editions of Windows 7. [8] 64-bit editions of Windows Vista and Windows XP allowed executing the 32-bit shell/Windows Explorer and making it the default for compatibility with shell extensions. As a result, all 32-bit shell extensions ...
Although the installation media included in retail packages is a 32-bit DVD, customers needing a CD-ROM or customers who wish for a 64-bit install media can acquire this media through the Windows Vista Alternate Media program. [103] The Ultimate edition includes both 32-bit and 64-bit media. [104]
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.
Icons in Windows Vista are visually more realistic than illustrative. Icons are scalable in size up to 256 × 256 pixels. Required icon sizes are 16 × 16, 32 × 32, and 256 × 256; optional sizes are 24 × 24, 48 × 48, 64 × 64, 96 × 96, and 128 × 128. Icons now display thumbnails depicting the actual contents of files.
Additionally, NTVDM and the 16-bit Windows on Windows subsystems, which allowed 32-bit versions of Windows to directly run 16-bit DOS and Windows programs, are no longer included with Windows 11. User-mode scheduling (UMS), available on x64 versions Windows 7 and later, was a lightweight mechanism allowing applications to schedule their own ...
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. [52] A boot-time option is available to disable this check for a single session of Windows. Installing user-mode drivers will still work without a digital signature.
All 32-bit editions of Windows Vista, excluding Starter, support up to 4 GB of RAM. The 64-bit edition of Home Basic supports 8 GB of RAM, Home Premium supports 16 GB, and Business, Enterprise, and Ultimate support 128 GB of RAM. [19] All 64-bit versions of Microsoft operating systems impose a 16 TB limit on address space.