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USB Controller not recognized after crash

My laptop is not recognissing the USB controller and am unable to use any USB device attatched to the laptop, can someone please help me to try and fix this problem? Thanks

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Re: USB Controller not recognized after crash

Well we can try something! First you gotta go to Device Manager! A quick way to get there is Start->Run type devmgmt.msc and press enter. If that don't work then Right Click on My Computer then click properties! Then Click on the hardware tab then the Device manager button, Under Universal Serial Bus Controllers if there are any devices with a yellow exclamation then right click on the device and click uninstall. then right click on any device and select Scan for hardware changes! This may or may not solve the problem, get back to me if any complications! If there isn't any device with a yellow exclamation or there aren't any Universal Serial Bus controllers get back to me! regards, babb

Posted on May 12, 2007

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Here are some steps which you can try. It is not always that the device is defective. Maybe the generic USB controller/driver needs to be uninstalled then reinstalled or the USB port itself is broken.

- Go to Device Manager -> Right click USB Controller -> select Scan for Hardware Changes.
To go to the Device Manager in xp (Start -> Run -> type devmgmt.msc -> press Enter or OK), in Vista and Windows 7 ( Start -> type devmgmt.msc on the start search box -> press Enter)

- Access BIOS setup (either Del, F2, F10...depending on the laptop brand) then look for the option to restore default BIOS settings.

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- If the above steps will not work, you're USB port may be defective already.

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1. Right click MY COMPUTER
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6. Right click on each USB CONTROLLER and select Uninstall
7. Uninstall all entries
8. Reboot your computer
9. As your computer re-boots it will reinstall all USB connections it detects
THEN, when all other USB items have been configured and connected by the system, you then should try connecting your USB device.

If I could be of further assistance, let me know. If this helps or solves the issue, please rate it.
Thanks, Joe

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1 Answer

Computer not recognizing any usb devices

Well, appears that your configuration can handle 4 GB of memory. I checked the Acer website for upgrades for your model, and nothing appears to jump out which could solve your problem. A few appear to be possibly helpful, but some are for XP, not Vista. Upgrading "launch manager" might be a good thing.

However, Belarc tells me that on my Acer 5630 i have listed under "Bus adapters" the following:
Intel(R) 82801G (ICH7 Family) USB Universal Host Controller - 27C8
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Intel(R) 82801G (ICH7 Family) USB Universal Host Controller - 27CA
Intel(R) 82801G (ICH7 Family) USB Universal Host Controller - 27CB
Intel(R) 82801G (ICH7 Family) USB2 Enhanced Host Controller - 27CC
And, under "other devices", i have a USB Root Hub (5x). Obviously, the two match. I go to device manager to check them out, finding them under 'univesal bus controllers", to see whether they are all working properly, and and they are. In addition, opening "system devices" reveals something called a "plug and play software device enumerator", and that checks out to be working fine as well. Check your equivalent out to see if you find a problem to fix. Hopefully you will. Let me know how things go.

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Hello Narin,

Check the USB properties if there are some errors at Control Panel> System> Device Manager> USB device. Install the compliment CD driver for USB devices. Also try placing the mouse into other USB port(s). Update your OS as necessary for device patches and if there's a need to install driver for the said mouse please install then.. Hope thos helps.

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it may be that there is a problem with the bios, as Vista enabled laptops have a later bios version, but i assume that you have exclamation marks where you mention these devices, if not then you have windows generic drivers running instead which will need to be uninstalled first especially the raphics driver as that would cause the main crashes. if you have no exclamation marks against these devices right click on each and select uninstall. Try again to install or run the drivers then restart the notebook and see which drivers the system tries to install, if you get the choice install them manually and point windows to install the drivers from where you have them saved if you are unable to run them. if you do succeed my advice is to install Vista on a seperate partition as i did so as to enable a dual boot and have both systems available when i need them

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