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we have one WINDOWS xp embedded 2009 system, after some days it`s all USB device stop working and even keyboard all stop working
This problem could arise from two possible sources. One is due to a malfunction in the USB hardware whether it is a flash drive or a peripheral like keyboard and mouse. In this case the best solution would be to check if the driver needs an update or if the cable has any discontinuity at any point. If that is not the case, the device may have a serious circuitry issues in which case a simple troubleshoot might not be the solution. But many of these cases are due to a problem associated with your host. Low speed port which could easily be solved with an alternate high speed port, failure to wait until the operating system initializes that can be avoided by unplugging your USB device and plugging it again or restarting your system and there is the obvious case of malware problems which could affect your hardware in which case an antivirus should always be installed and updated on your computer for a regularly scheduled scanning.
Try the following solutions below:
1. Restart your computer. Sometimes, your computer needs a restart to resolve this issue.
2. Unplug the USB device and then reconnect it back. Or try going on your Device Manager and locate the USB device from the list. And then right-click the USB device and click Uninstall. When it is already uninstalled, unplug the USB device and then wait for few minutes before you reconnect it again. The driver for your USB will automatically load up.
3. Reinstall the USB Controllers. To do this, just simply open your Device Manager and then locate and expand the Universal Serial Bus Controllers. Right-click on each device and click Uninstall. Restart your computer and your USB Controllers will automatically install.
4. Install available Hotfixes in Microsoft website.
5. Install the latest updates for your Windows.
6. Scan your computer for viruses, malware or spyware. A virus can also be the cause for this issue.
7. Go to your Manufacturer's website and find any new driver updates for your USB, Motherboard and Intel Chipset drivers.