To permanently set a user environment variable, use the Advanced tab of the system property sheet. After you set this environment variable, the Details tab of the device will be available in Device Manager. To enable this tab, set the user environment variable DEVMGR_SHOW_DETAILS to 1. The tab's page displays device identification strings, together with device and driver configuration information that can be useful when you debug drivers. ![]() ![]() This tab displays lots of information useful to driver developers and testers, and aids Microsoft Customer Support Services (CSS) in diagnosing customer problems. ![]() Device Manager provides a Details tab for each device.
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