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A number of computer operating systems employ security features to help prevent malicious software from gaining sufficient privileges to compromise the computer system. . Operating systems lacking such features, such as DOS, Windows implementations prior to Windows NT (and its descendants), CP/M-80, and all Mac operating systems prior to Mac OS X, had only one category of user who was allowed ...
Applications written with the assumption that the user will be running with administrator privileges experienced problems in earlier versions of Windows when run from limited user accounts, often because they attempted to write to machine-wide or system directories (such as Program Files) or registry keys (notably HKLM) [2] UAC attempts to ...
Windows Vista Beta 2 (built on May 18, 2006, with a build number of 5384), was released to Microsoft Developer Network subscribers (the first since 5308) and Microsoft Connect testers on May 23, 2006, in conjunction with Bill Gates's keynote presentation at the WinHEC 2006 conference. On June 6, Microsoft extended the availability of Beta 2 to ...
In Windows Vista, the Windows Display Driver Model (WDDM) does not support two different display adapters. When using two display adapters, both must use the same WDDM driver. Although Windows Vista still supports XPDM drivers, a WDDM driver is required for the Windows Aero user experience. [54] [55]
The Compatibility tab in Windows Explorer includes new options to Disable desktop composition, Disable display scaling on high DPI settings, and Run this program as an administrator. There are new options to run programs in compatibility mode for either Windows XP (Service Pack 2) or Windows Server 2003 (Service Pack 1).
Windows XP has suffered criticism for security problems and issues with performance. Vista has received criticism for issues with performance and product activation. Another common criticism of Vista concerns the integration of new forms of DRM into the operating system, and User Account Control (UAC) security technology. [1] [2]
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Windows Vista also supports network cards with TCP Offload Engine, that have certain hardware-accelerated TCP/IP-related functionality. Windows Vista uses its TCP Chimney Offload system to offload to such cards framing, routing, error-correction and acknowledgement and retransmission jobs required in TCP. However, for application compatibility ...