Hardware

Ask something
Question Locked

USB ports stopped working

0 helpful
9 replies

by frawser7917 2 views

Closed to new repliesThis discussion is closed. It stays readable, but it takes no new replies.

hi, i am using windows 7. I have 6 USB ports in my computer and all the ports stopped recognizing any USB devices like pen drive, webcam, printer etc. It was running fine with windows 7 and i have been using the devices. I had even done a windows update and also reinstalled motherboard drivers still no use. I had also tried updating chipset drivers from Intel. but no use. Finally i had reinstalled windows 7 and then installed the motherboard drivers still it is not working. I had also tried uninstalling and reinstalling the USBs through device manager. But no use. All of a sudden the USB ports stopped working. Not sure about further troubleshooting.

I am using Intel core2duo e4400 2ghz. D945GCNL.Essential series.

9 replies

by ---tk---

try downloading a Linux CD, run the cd in Live mode, then try using the USB ports.

If they work with the Live CD, then its Win 7 causing the issue. If they dont work then it is the hardware.

by oh smeg

Been disabled in BIOS have they?

If they haven't I would follow the above advice get a Live Linux from either here

http://www.livecdlist.com/

Or buy a Linux Mag from your Local Newsagent with a Live Linux as a Cover Disc and test the Hardware that way. ;)

Col

by frawser7917

i tried with fedora and the USBs are working fine. I dont understand why it has suddenly stopped working in windows 7. All the USBs were working fine for 20 days with windows 7. And all of a sudden stopped working. Can anyone help me regarding this

by oh smeg

If you didn't or the OS itself didn't activate correctly after a set period it starts to turn off devices. I would double check that it is actually activated. ;)

Though when I was testing 7 for corporate deployment I ran across all sorts of screwy issues nothing big but I had to rebuild the OS several times which just meant to me that 7 is not stable enough for rolling out yet.

Col

by frawser7917

It shows that it is a genuine copy of windows in Computer>Properties. And also says that windows is activated. Is there any other way to double check the activation

When I double check the USB properties in device manager it shows "Windows has stopped this device because it has reported problems. (Code 43)" Is there any way to make windows not to stop the devices??

by frawser7917

Sorry for a delayed reply. I tried that link but they didn't provide any resolution properly and that doesn't solve my problem. I found one new thing. I couldn't start, stop, resume or pause the plug and play service in services.msc. It is all frozen up. I think this may give a lead for this usb issue or might solve the problem. Can you help me in enabling these options.

by ic-it

It is someone elses fix but I didn't copy the source when i found it (maybe Jacky Howe???).

1. Click Start, point to All Programs, point to Accessories, and then click Command Prompt.
2. At a command prompt, type the following command, and then press ENTER:
set devmgr_show_nonpresent_devices=1
3. Type the following command at the command prompt, and then press ENTER:
start devmgmt.msc
4. Troubleshoot the devices and drivers in Device Manager.

NOTE: Click Show hidden devices on the View menu in Device Managers before you can see devices that are not connected to the computer.
5. When you finish troubleshooting, close Device Manager.
6. Type exit at the command prompt.

Phantom Devices are icons that appear translucent or faded.

Delete all of the Phantom devices that are not connected to the computer. Check under Portable Devices and Universal Serial Bus controlers. Also uninstall the device if it is listed in under Portable Devices. Remove Unknown device as well.
Under Universal Serial Bus controlers remove all USB Universal Host Controlers.

Uninstall all devices under USB Controllers.
Uninstall all devices under Disk Drives.
Do the same under Storage Volumes leaving the exposed Generic volume.
Don't accept any reboot prompts until you are finished.
If you have a yellow ! with unknown devices, uninstall all of the entries there as well.

Restart the System and see if it is detected.

If it is now detected but it is not allocated a Drive letter try this.

Write down all fixed Disk and CD/DVD drive letters so as not to delete them. DO NOT delete any of the fixed hard disk drives or CD/DVD optical drives registry values.

1. Login with Administrative privileges.

2. Disconnect all USB or FireWire storage devices.

3. Open Registry Editor by typing regedt32 in the Run box and navigate to the following registry key: HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices. Right click on MountedDevices and select Export. Save this file as you may need it in case something goes wrong. Save it as Devices.reg, it should default to My Documents.

4. Under HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices there will be registry keys with the name that resembles the format of \DosDevice\X: where X can be any alphabet letter which corresponding to your physical system drive letter.

5. Delete all possible USB drives, FireWire drives and external drives which have a drive letter.

DO NOT delete any of the fixed Hard Disk Drives or CD/DVD optical drives registry values.

Exclude \DosDevice\A: which normally reserved for floppy disk drives.

This discussion is closed to new replies.