Solved unknown device in device maneger win 8.1

when look in the device manager i get this:
http://cloud.addictivetips.com/wp-content/uploads/2010/04/UnknownDeviceManager.jpg
and PCI Device above this to unknown device ( i took this photo from google)


when i try to delete it back after restart or Scan hardware change


please help
lenovo ThinkPad Edge E540 20C6006JIV win 8.1

hello,you need to go to Lenovo driver and support website for you model and make sure you have all the updated drivers for all devices on the laptop

These are probably hardware components that windows does not have a driver for. You may be able to right click on each missing device and select "properties" - something there may give you a clue about what they are. Is there any hardware or feature on the laptop or plugged in that is not working (eg bluetooth, network)?

i install this driver:
Lenovo Support - Drivers & Software (US)
you can write this 20C6006JIV to find the drivers for my computer (win 8.1)

lcx said:

i install this driver:

Audio
Bluetooth and Modem
Chipset
Mouse and KeyboardNetworking: LAN (Ethernet)
Display and Video Graphics
Networking: Wireless LAN
Networking: LAN (Ethernet)
what more i need? this the site: ​

Lenovo Support - Drivers & Software (US)
you can write this 20C6006JIV to find the drivers for my computer (win 8.1)

Click to expand...

Look for PCIE Card reader Driver from Lenovo site and install.

brummyfan said:

lcx said:

i install this driver:

Audio
Bluetooth and Modem
Chipset
Mouse and KeyboardNetworking: LAN (Ethernet)
Display and Video Graphics
Networking: Wireless LAN
Networking: LAN (Ethernet)
what more i need? this the site: ​

Lenovo Support - Drivers & Software (US)
you can write this 20C6006JIV to find the drivers for my computer (win 8.1)

Click to expand...

Look for PCIE Card reader Driver from Lenovo site and install.

Click to expand...

ok thank this solved! but i can not install camera drive , when i try install the driver i got this massage in the end : " no appropiate driver to be install " and when i try to get to the camera app its request to Connect camera

Right click the driver, go to Properties, select compatibility tab then select to install in Windows 8 mode. You could also try the Win 8 Driver, might work.

brummyfan said:

Right click the driver, go to Properties, select compatibility tab then select to install in Windows 8 mode. You could also try the Win 8 Driver, might work.
View attachment 41701

Click to expand...

not worked

Try uninstalling the Camera driver in Device manager and reboot and see what happens.

brummyfan said:

Try uninstalling the Camera driver in Device manager and reboot and see what happens.

Click to expand...

there no driver for cemera

Expand your Imaging device in Device manager, right click Webcam, and the generic driver for the camera should be in Properties.

brummyfan said:

Expand your Imaging device in Device manager, right click Webcam, and the generic driver for the camera should be in Properties.
View attachment 41733

Click to expand...

I do not have this category

update: Computer asking to connect the camera

brummyfan said:

Expand your Imaging device in Device manager, right click Webcam, and the generic driver for the camera should be in Properties.
View attachment 41733

Click to expand...

I unplugged the electricity and it back! thank a lot!

You are welcome, glad you got it sorted