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Missing USB controller driver

After Vista upgrade, there are two "Unknown Device" showing in the Device Manager under the USB section. The Properties describes them as USB controllers which are missing drivers. I have 3 USB ports, none of which currently work but did before the upgrade.

In addition, there are 3 ATI I/O Communications Processors; 2 USB 1.1 OHCI controllers and 1 USB 2.0 EHCI controller. All seem to be working fine.

There are also 3 USB Root Hubs which all seem to be working fine.

I am confused about what the two Unknown Devices actually are AND what I need to do to get the USB ports to work.

Any ideas?

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When posting driver issues, you need to specify what kind of equip you are dealing with, not just the issue. Most liekly you need to go to the manufacturs website of your motherboard or laptop and find vista drivers for it.

Posted on Jul 29, 2008

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Unknown device win 7


Usually, when you buy any hardware the drivers come along with it on a disc. If you lose the driver disc you can always download the necessary drivers from the manufacturer's website. But what do you do when you are not sure of the manufacturer of the hardware? Well now you will know what to do.

Open Device Manager (Control Panel>System>Hardware>Device Manager) The hardware whose drivers are missing will appear as Unknown device, so it's easier to locate the device. Right click on the unknown device and click on Properties. Under the Properties window click on Details tab and select Device Instance Id from the drop down box. You should see a code similar to this: PCI\VEN_8086&DEV_27DC&SUBSYS_30868086
& REV_01\4&1E46F438&0&40F0 In the text above the Vendor ID and Device ID will always be in the same place for the driver Vendor ID = 8086 and Device ID = 27DC your numbers will be different. Once you have obtained both the IDs, proceed to PCI Database. There you can either search for the vendor from the vendor ID or directly get information about the device along with the vendor name by searching with the device ID. http://www.pcidatabase.com/
b>Windows 7 First, please disconnect all USB devices and then perform the following steps:

Click "Start" button, type "devmgmt.msc" (without quotation marks) in the "Search" bar and press "Enter". Click "Continue" if necessary.

In Device Manager, double click to expand "Universal Serial Bus controllers", right click on the Host Controller, click "Uninstall" and click "OK".

Repeat the step 2 to uninstall all items under "Universal Serial Bus controllers".


Then, restart your computer and Windows 7 will reinstall all USB controllers automatically. Hope this helps. b>

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Hi,

You just need to download the appropriate audio driver for your motherboard. Go to the Device Manager and install all missing drivers for "Unknown Devices". Either connect to the internet or use the driver disc which came with your laptop.

For those who doesn't know how to access Device Manager, please follow the steps below.

For Windows XP:
Start -> Run -> Type devmgmt.msc (in the box) -> Right click Unknown device -> Properties -> Driver tab -> Update driver

For Windows Vista and Windows 7
Start -> Type devmgmt.msc (in the start search box) -> Right click Unknown device -> Properties -> Driver tab -> Update driver

Hope this helps.

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1. try using usb1 port ( instead of usb2)
2. check the Device-manager for USB controllers normality. (or try to upgrade versions)

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Yes,
 you need a Vista driver for this device, windows 95 shows how old it is !
If you are upgrading from WIndows XP to Vista delete all the mouse drivers in the device manager (under control panel).
Then let Vista install new ones.

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Multimedia audio controller


This indicates that the sound drivers are missing from your computer. You will have to identify the sound card that is installed on your computer before proceeding with downloading the correct driver. To identify the sound card, follow the steps below (Assuming that you are using Windows XP)

  1. Open Device Manager (Right-click My Computer>Properties>Hardware>Device Manager)
  2. The hardware whose drivers are missing will appear as Unknown device, so it’s easier to locate the device.
  3. Right click on the unknown device and click on Properties.
  4. Under the Properties window click on Details tab and select Device Instance Id from the drop down box.
  5. You should see a code similar to this
    PCI\VEN_8086&DEV_27DC&SUBSYS_30868086&REV_01\4&1E46F438&0&40F0
  6. The portion of the code highlighted in RED is the Vendor ID and the portion highlighted in GREEN is the Device ID. In this example:
    Vendor ID = 8086
    Device ID = 27DC
  7. Once you have obtained both the IDs, proceed to www.pcidatabase.com . There you can either search for the vendor from the vendor ID or directly get information about the device along with the vendor name by searching with the device ID.

Mar 25, 2009 | Acer Computers & Internet

1 Answer

I don't have driver of pen drive in windows 98


Let's check your Windows 98 Version first :)
  • Right click on My Computer and select Properties
  • On the System Properties page that opens up click on the General tab, if it is not already on that page.
  • Under the System heading, look for the version number (see right)
    • Version 4.10.1998 is the original version of Windows 98 (98FE)
    • Version 4.10.2222 is Windows 98 Second Edition (98SE)
  • Click the link below for the download and installation instructions for your version of Windows 98
Fo Windows 98 FE:
  1. Download and install the Windows 98 Service Pack (35.5Mb)
  2. Download to your desktop the driver file from the Download section below
  3. Remove ALL drivers for USB flash drives in Device Manager (Optional)
  4. Remove ALL drivers for any USB 2.0 controllers (many have an uninstall option) (Optional)
  5. Remove ALL unknown devices from Device Manager
  6. Run the exe file you downloaded, and follow the instructions, rebooting after installation
  7. When the computer boots up again, it may detect new USB 2.0 controllers, in which case you may need to reboot again
The drivers can be downloaded from the following link:
Windows 98 FE Generic USB Mass Storage Device Drivers v3.20


For Windows 98SE:
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  2. Remove ALL drivers for USB flash drives in Device Manager
  3. Remove ALL drivers for any USB 2.0 controllers (many have an uninstall option)
  4. Remove ALL unknown devices from Device Manager
  5. Run the exe file you downloaded, and follow the instructions, rebooting after installation
  6. When the computer boots up again, it may detect new USB 2.0 controllers, in which case you may need to reboot again
The drivers can be downloaded from the following link:

Windows 98 SE Generic USB Mass Storage Device Drivers v3.3

For detail explanation, please visit http://www.technical-assistance.co.uk.
It's help for me :)

Thanks
AkulahPathub

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Seagate 250GB USB external harddrive was working now it is not. Cannot see it in Disk Management. In Device Manager, USB controllers the harddrive shows up as Unknown Device when I plug it in. In...


unplug seagae usb external h/d
Device manager>Under usb= ,uninstall the device.
run: RESTORE, choose the last check point, reboot,then plug in the h/d in your usb.

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