I get message "USB device not recognized", but two USB devices are actually works very well. Poster sometimes Device Manager 'unknown device', then it will disappear and reappear.

Poster sometimes Device Manager 'unknown device', then it will disappear and reappear with the error message.  Sometimes, I see the message even when there is nothing in the USB port.

Hi malsnano,

I see that usb devices do not work on xp. I'll help you with this problem.

1. What is the brand and model of the computer?

2. what security software is installed on the computer?

3. have you made changes on the computer recently?

4 is the issue limited to these usb devices?

Method 1:

Run the fixit from Microsoft Fixit article and if that helps.

Hardware devices do not work or are not detected in Windows:

http://support.Microsoft.com/mats/hardware_device_problems/en-us

M odes 2:

Put the computer in a clean boot state, then check if that helps.

How to solve the problem by performing a clean boot state:
http://support.Microsoft.com/kb/929135

Note: Once you have completed troubleshooting, perform the steps in step 3: to reset the computer as usual.

Method 3.

Run a full scan of the computer with the Microsoft Safety Scanner to make sure that the computer is virus-free.

Microsoft safety scanner: http://www.microsoft.com/security/scanner/en-us/default.aspx

Warning of Security Scanner: there could be a loss of data while performing an analysis using the Microsoft safety scanner to eliminate viruses as appropriate.

Method 4.

You can disconnect all USB devices and then perform the following steps:

1. click on start and then click Control Panel.
2. click on system and Maintenance, click System, and then click Device Manager.
Note that if control panel is in Classic view, double-click System and then click on Device Manager.
If you are prompted for an administrator password or a confirmation, type the password, or click on allow.
3. in Device Manager, double-click to expand the "USB Bus controllers", right click on the controller host, click "Uninstall" and click "OK".
Check that if at all, there is an exclamation point on the pilot, it suggests problems with the installed driver.
4. Repeat step 2 to uninstall all items under 'USB Bus controllers'.
Then, restart the computer and Windows XP will automatically reinstall all USB controllers.

Let us know if you need assistance with any windows problem. We will be happy to help you.

Tags: Windows

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