Sunday, September 23, 2012

Windows 8: Hyper-V USB Controller Unable To Start

When I enabled Hyper-V (virtual machine support) on my desktop PC my USB devices wouldn't work at bootup. When I remote connected into the PC and went to the device manager I noticed that the USB Host Controllers had failed to start. Disabling and re-enabling them made them work, but once I rebooted the problem persisted so I went digging through my UEFI BIOS. From here I had options for USB Legacy Support and USB EHCI Hand-off. USB Legacy Support was enabled while EHCI Hand-off was disabled. Apparently this does not work well with Hyper-V. Once I changed EHCI Hand-off to enabled my USB devices started to work with Hyper-V enabled. 

So, if you're having trouble with your USB devices such as mouse and keyboard not working with Hyper-V Enabled, dig around in your UEFI / BIOS menu for USB options such as EHCI Hand-off.

2 comments:

Unknown said...

Thanks, was going a little nutty trying to figure this problem out.

secretsubject said...

USB drives are a great way to protect and transfer any kind of electronic data. They can carry all file formats and can keep them safe as long as you protect them with an antivirus program.
bulk usb flash drives