Wednesday, July 6, 2016

Troubleshoot:All usb ports not working - Error code 19 Error

All usb ports not working - Error code 19

Hi my laptop runs on XP pro, yesterday all my USB ports have suddenly stopped working.

When I go to the device manager and expand the Universal Serial Bus Controllers, all have a yellow exclamation mark beside them.

When I check their status this is the message: Windows cannot start this hardware device because its configuration information (in the registry) is incomplete or damaged.
(Code 19).

I was not in the registry prior to this, so I don't know how it got damaged.
I have followed instructions from here
I tried this: Click Uninstall, and then click Scan for hardware changes to load a usable driver – no effect.

I tried this: Restart the computer in Safe Mode, and then select Last Known Good Configuration,which rolls back to the most recent successful registry configuration – didn't fix the problem.

Microsoft says that as a last resort, you can edit the registry directly – but I not sure where and what to edit in the registry plus the link provided doesn't go anywhere.

If anyone can tell me what keys to edit in the registry I would very appreciative.
I will do anything to avoid reinstall windows from scratch.

I unfortuately didn't have system restore going so I cannot use that.

There is a somewhat similar question in this forum here
but the answer provided SpiritX MS MVP does not include editing the registry.

Thank you in advance.

Anwsers to the Problem All usb ports not working - Error code 19

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Click on the Start button.
In the search box of Windows Vista, type regedit and click OK or press the ENTER key.
expand folders until you reach the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class.

You should see a long list of subkeys open up under Class
You are looking for these class guid
Click the registry sub key corresponding to the device's Class GUID
Right-click on UpperFilters and choose Delete.
Choose Yes to the " Deleting certain registry values could cause system instability.
Are you sure you want to permanently delete this value
Repeat the LowerFilters value
Close Registry Editor.
Restart your computer.
Works for xp also just click start and run then type in regedit

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