Swipe in from the right edge of the screen, and then tap Search. If you're using a mouse, point to the lower-right corner of the screen, move the mouse pointer up, and then click Search. Enter Device Manager in the search box, and tap or click Device Manager. In the list of hardware categories, double-tap or double-click the category your device is in and then double-tap or double-click the device you want. For example, to see your video card, tap or click Display adapters , and then double-tap or double-click the video card name.
Tap or click the Driver tab, tap or click Update Driver , and then follow the instructions. You might be asked for an admin password or to confirm your choice. Occasionally, you might see a notification that a driver is unsigned, has been changed since it was signed, or can't be installed by Windows. We recommend that you don't install unsigned or changed drivers. A digitally signed driver includes a digital signature, which is an electronic security mark that indicates the publisher of software and whether someone has tampered with it since it was signed.
If a driver has been signed by a publisher that has verified its identity with a certification authority, you can be confident that the driver comes from that publisher and hasn't been changed. If you see any of the following notifications when you're installing a driver, you should stop the installation and go to your device manufacturer's website to get a digitally signed driver for your device.
The driver doesn't have a digital signature or has been signed with a digital signature that wasn't verified by a certification authority.
You should only install this driver if you got it from the manufacturer's disc or from your system administrator. The driver hasn't been digitally signed by a verified publisher. The driver might have been changed to include malware that could harm your PC or steal info. In rare cases, legitimate publishers do change drivers after they've been digitally signed, but you should only install an unsigned driver if you got it from a device manufacturer's disc.
Unfortunately, there's no trustworthy source of info that indicates who has published an unsigned driver. Anyone can change the contents of an unsigned driver, and there's no way to know why it was changed. Most manufacturers now digitally sign the drivers they create before releasing them to the public. A driver that lacks a valid digital signature, or has a signature that was changed after it was signed, can't be installed on bit versions of Windows.
You'll only see this notification if you have a bit version of Windows and try to install such a driver on it. Download and install drivers in Windows 8. Need more help? Join the discussion. A subscription to make the most of your time. Try one month free. Was this information helpful? Yes No. In the list of updates, select the update containing KB , and then tap or click Install.
If you're prompted for an administrator password or confirmation, enter the password or provide confirmation. Follow the previous steps to check for updates, install all important updates, particularly KB , restart your PC, and then check for KB again. Depending on your version of Windows, you'll need the following amount of available drive space on your PC to download and install the Windows 8.
Note: These amounts are estimates, so you might need slightly more or less available drive space for the update. If you see any of the following Windows Update errors when you try to install the Windows 8.
If you need more help, contact Microsoft support. This error might mean that a file needed by Windows Update is damaged or missing. Here are a few steps you can try to fix the problem:. Run the Windows 8. If you're running Windows RT 8. For info about how to fix this problem, contact Microsoft support.
This error might mean that your PC couldn't connect to the Windows Update servers. If you're using a VPN connection to connect to a work network, disconnect from the network and turn off the VPN software if applicable and then try to install the update again. The error could also mean there isn't enough free space in the System Reserved partition.
You might be able to fix this problem by using third-party software to increase the size of the System Reserved partition. Error: We couldn't complete the updates. Undoing changes. Don't turn off your computer. Error: Failure configuring Windows Updates. Reverting changes. These are generic errors that might appear any time a Windows update fails. You'll need to determine the specific error code to investigate how to best resolve this problem You can find the error code for the failed update by viewing your update history.
Look for KB in the list, note the error code, and then contact Microsoft support. To view your update history:. Open Windows Update by swiping in from the right edge of the screen or, if you're using a mouse, pointing to the lower-right corner of the screen and moving the mouse pointer up , tapping or clicking Settings , tapping or clicking Change PC settings , and then tapping or clicking Update and recovery.
This error might mean that your PC doesn't have the required update KB installed. Check to make sure that all important updates, including KB , are installed on your PC. If all updates are installed, you might need to refresh your PC.