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The DriverStore is a repository for driver packages managed by the Windows Driver Install Frameworks (DIFx). They use the driver store to store and retrieve driver packages. Drivers are not directly run from this directory.
This holds compressed driver cab files. Cab files are used to extract a needed device driver when new hardware is added without requiring the Windows XP installation CD. Each service Pack adds additional .cab files.
The WinSxS directory holds Windows Side-by-Side DLLs. WinSxS allows multiple versions of the same DLL (code libraries) to exist on the same system. This ensures that every application will get the DLL version they were tested and designed for. The result is improved application and system stability. See details for full directory location.
There are no known security risks in using Unires.dll assuming it has not been modified or replaced by virus or malware and it resides in the default directory. This file is installed as part of the Windows operating system.
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