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New sneaky Windows driver UCPD stops non-Microsoft software from setting defaults

Microsoft has integrated the driver userChoice Protection Driver, short UCPD, into Windows 10 and Windows 11 systems recently. This driver has just one purpose: to block access to UserChoice Registry keys.

These Registry keys define the default programs on the system. There are keys for the default web browser, PDF Viewer, or image editor. Keys exist for file extensions and protocols as well.


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