In this scenario, the computer does not detect the USB device. Note This issue affects USB 2. This issue occurs because the USB port is disabled after you safely remove the device from the port. To resolve this issue, install the Windows RT, Windows 8, and Windows Server update rollup , or install the hotfix that is described in this article.
Additionally, you must set the registry key thatis described in the "Registry information" section to enable this update rollup or hotfix. For more information about how to obtain this update rollup package, click the following article number to view the article in the Microsoft Knowledge Base:. A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article.
Apply this hotfix only to systems that are experiencing this specific problem. If the hotfix is available for download, there is a "Hotfix Download Available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix. Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix.
For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft website:. If you do not see your language, it is because a hotfix is not available for that language. Important This section, method, or task contains steps that tell you how to modify the registry.
However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:. Note In Windows 8 and Windows Server , you must create the registry key before you restart the computer after you have applied this hotfix.
To enable the update for a specific device, follow these steps:. If you're using a mouse, point to the lower-right corner of the screen, move the mouse pointer up, click Settings , and then click Change PC settings. Tap or click Update and recovery , and then tap or click Windows Update. Under Important updates , choose Install updates automatically recommended.
If your device came with a disc, it might contain software that installs a driver. Before you install a driver from a disc, check the info that comes with it to be sure it supports your current version of Windows. You can also search for new drivers on the manufacturer's website. Driver updates are often available in the support section of their website. Download the latest driver for your device, and follow the installation instructions on the website.
You can usually double-tap or double-click the downloaded file to install the driver on your PC. If the driver you got from a disc or downloaded from a website doesn't install itself, you might need to install manually. 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.
Read the System Requirements If you will be installing the operating system for the first time, you will need your Windows product key xxxxx-xxxxx-xxxxx-xxxxx-xxxxx. For more information about product keys and when they are required, visit the FAQ page. Select edition Windows 8. Select an edition from the drop down menu. Visit the Download Academic Products page for Education editions product key required.
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