Error code 43 in Device Manager.

I have a 43 error that keeps appearing and disappearing.  USB devices worked for a day then stopped working since.  It started sometime in March, and now they are not coming back.  The USB mouse lights up as if it was on and lights up when you move like its supposed to do but it still does not work.  The keyboard does nothing.  I am currently using a ps/2 keyboard.  I have a Windows 8 Inspiron 660 computer with a motherboard Asrock z77 pro4 and a gtx 275 graphics card.  Although my windows is not 'true' so to speak I bought it on its Web site.  I have also 2 monitors connected, one to the motherboard the other to the graphics card.  In Device Manager, the "unknown devices" are sometimes there and sometimes not.  So far, I have tried

  1. Uninstall the usb ports controllers.
  2. Download the latest drivers for my device.
  3. Update the computer several times.
  4. Unplug the unit and plug the usb devices.
  5. Plug my camera on other computers and they worked,
  6. Connect the other devices work in my computer that did not work.
  7. Thanks to the Fixit kit which does not work.

I was wondering if I pay for support and it does not solve my problem I would get a refund or not.  I have also to documents on when usb devices worked.

When the Board of Directors and the mouse worked it showed in Device Manager but the "unknown devices" is a not disappear, even if the keyboard and mouse were the only things connected.


I just noticed that my "Standard Enhanced PCI to USB Host Controller" has an error of 45 and he said: it's not connect.  I don't know what this means, but it may be useful.

-----------------------------------------------Other Information----------------------------------------------------

It is an error 45 and he says its not connected, it seems important.


Hello Roger,.

Thanks for the reply.

I'm sorry for the late reply.

I suggest you try the following steps and check if it helps.

Remove all USB devices connected to the computer.

b. press Windows + R keys, type regedit into the run window and press ENTER.

If you are prompted for an administrator password or a confirmation, type the password, or click on continue.

(c) in the navigation pane, search for, and then click the following registry subkey:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\ {4D36E967-E325-11CE-BFC1-08002BE10318}

d. in the pane of details, right click 'LowerFilters' and then click 'remove '.

e. click 'Yes' when prompted.

f. close the registry editor and restart the computer.

Note: Serious problems can occur if you modify the registry incorrectly. Therefore, make sure that you proceed with caution. For added protection, back up the registry before you edit it. Then you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click on the number below to view the article in the Microsoft Knowledge Base:

I hope this helps.

Thank you

Tags: Windows

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