Found new hardware - unknown device

[jkj]

After every boot my computer shows found new hardware although nothing new is installed. But few days back I had updated the system. I don't know if that's the reason because there is few days gap between these events. I have vista 32bit, Intel core 2 Duo processor 2.10 Ghz.
Device manager shows an unknown device but when I click on reinstall driver windows cannot find anything.

 

[kinghthood]

Hello,
Are there any external devices connected to the computer?
If yes, disconnect the device and check if unknown device there or not.

 

[jkj]

no external device is connected

 

[kinghthood]

Where exactly do you see "unknown device"
Is it in device manager?

Also could you provide the make of your computer.

 

[jkj]

I use sony vaio . there's unknown device folder in device manager between network adapters and portable devices

 

[kinghthood]

Please provide the device ID for unknown device

Go to Device manager and right click on the unknown device and click properties-> go to details tab and please provide the Device ID.
In the dropdown menu, choose "Device Instance ID" to get the device ID.

 

[kinghthood]

Also,

Try to install Sony Corporation - Input - Sony Firmware Extension Parser Device from support website of sony and select the correct model number of the computer. http://esupport.sony.com/US/p/select-system.pl?

 

[Madhur B]

Hi jkj,

In case if the steps mentioned by kinghthood do not work then, try to do a system restore. Providing the link to do system restore on the computer: http://www.vistax64.com/tutorials/76905-system-restore-how.html

Then check if the “unknown device” is available or not.

For any further questions in future please feel free to contact us.