Did you run the self test programs? Add a comment. Active Oldest Votes. Improve this answer. Keltari Keltari Reinstalling driver solved the problem. However, when I switched between the options again the problem returned. So I'll set it, and leave it alone.
Bryan Bryan 1. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Multiple displays allow you to extend your desktop across more than one monitor. If one the display adapters are built into the motherboard, note these additional considerations: 1. The motherboard adapter always becomes the secondary adapter. It must be multiple-display compatible.
You must set up Windows XP Professional before installing another adapter. Windows XP Professional Setup disables the motherboard adapter if it detects another adapter. Some systems completely disable the onboard adapter on detecting an add-in adapter. If you are unable to override this detection in the BIOS, you cannot use the motherboard adapter with multiple displays. However, on some computers, the BIOS allows the user to select the primary display device. You cannot stop the primary display.
Click Start , click Run , type control sysdm. Under Drivers , click Driver Signing , and then click Block - Never install unsigned driver software. To view a list of device drivers installed on your computer that are not digitally signed, use either of the following methods:. Error 0xef: The third-party INF does not contain digital signature information. Use the File Signature Verification tool The File Signature Verification tool lists all the unsigned drivers that are installed on your computer.
It creates a Sigverif. Use any text editor for example, Notepad to view the file. To use the File Signature Verification tool to display a list of drivers that are not digitally signed, follow these steps:. Click Start , click Run , type sigverif, and then click OK. Click Advanced , click the Search tab, and then click Look for other files that are not digitally signed.
Click to select the Include subfolders check box, and then click Browse. Review the list, and then contact the driver manufacturer for information about how to obtain an updated driver that is digitally signed.
USB devices that are based on earlier versions of the USB specification may create ghost devices that appear when the device is connected, and then disappear when the device is disconnected.
Also, the device may work fine, but may create a disassociated unknown device. This is typically caused by firmware that is either outdated or configured incorrectly. In this case, contact the device manufacturer for updated firmware. A ghosted device can appear if you manually install a driver for a Plug and Play device that the computer has already detected and installed. You can resolve this issue by deleting the ghosted device.
For more information about how to use Device Manager to manage devices in Windows XP, click the following article numbers to view the articles in the Microsoft Knowledge Base:. The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.
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