Article ID: 831583 - View products that this article applies to.
When you install a device driver, and Microsoft Windows 2000 or Microsoft Windows XP detects that the device driver is not digitally signed, you may receive a warning message and an option to cancel or continue the installation. This message appears even though Windows is configured with the DriverSigningPolicy setting set to Ignore.
The following error message may also be written to the Setupapi.log file:
E245: The device installation digital signature failure policy has been elevated from Ignore to Warn due to a proposed replacement of a protected system file.
This behavior occurs when an installation program tries to install an unsigned driver that will replace an existing signed driver that is protected by the operating system. Windows will automatically raise the driver signing policy from Ignore to Warn when an attempt is made to replace a protected system file. This is a function of Windows File Protection to promote the overall stability of the operating system.
For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/298503/ )Driver signing registry values cannot be modified directly in Windows
(http://support.microsoft.com/kb/314479/EN-US/ )How to Add OEM Plug and Play Drivers to Windows XP
Article ID: 831583 - Last Review: April 29, 2008 - Revision: 2.1