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Driver Verifier
A component of Microsoft Windows
Driver Verifier.png
Driver Verifier in Windows 7.

Driver Verifier is a tool included in Microsoft Windows that replaces the default operating system subroutines with ones that are specifically developed to catch device driver bugs. [1] Once enabled, it monitors and stresses drivers to detect illegal function calls or actions that may be causing system corruption. It acts within the kernel mode and can target specific device drivers for continual checking or make driver verifier functionality multithreaded, so that several device drivers can be monitored at the same time. [1] It can simulate certain conditions such as low memory, I/O verification, pool tracking, IRQL checking, deadlock detection, DMA checks, IRP logging etc.[1]

Driver Verifier (Verifier.exe) was first introduced as a command-line utility in Windows 2000 [1]; in Windows XP, it gained an easy to use graphical user interface, called Driver Verifier Manager using which it is possible to enable a standard or custom set of settings to select which drivers to test and verify. Each new Windows version has since introduced several new, more stringent checks for testing and verifying drivers and detecting new classes of driver defects.

Driver Verifier should be enabled with caution on production systems as it can expose and enable undetected bugs in drivers, especially ones which are not digitally signed by Windows Hardware Quality Labs, causing the system to display blue screen errors. Microsoft recommends not all drivers should be verified at the same time. [2]

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