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I fixed the problem by installing an old driver manually, but the problem is back again after upgrading to Win 10 1511 !
and the old driver didn't fix it anymore. help me plz

sorry for my bad English ! I meant I did reset the windows (clean install)

I did install the driver manually and it works well, but it didn't work after resting the laptop !

!!!!!!!!!!!!!!!!!!!!!!!!!!!!

?????????????????????????????????????????????????????,

Thank you it worked !
I knew that the problem was on PCI but I didn't fine the right driver (I used Driverbooster)

I did a clean install of Windows 10

yes I did, it says nothing about the hardware.

how ?

I didn't find the video card at all
And those PCI 's Vendor is 1106, I guess 1106 is for the sound, right !

I found it hard hhh

I found what Win 10 installed before, and isn't working fine, that's why my bandwidth is slow.

The 341.74 driver is what I was trying to install after upgraded to Win 10, but it didn't detect my hardware !

Geforce 8400 Gs For desktopim using win 10 64bit

it didn't work. I tired Widows 8 driver before and it didn't work too

I tried to install Nvidia driver but it always says the driver didn't detect any compatible graphic hardware ?

No one can help me ?

I'm looking for Wireless Driver because Windows 10 slowdown my bandwidth, I used the cable and I found it fine.
The model is : Dell Wireless 1702 802.11b|g|n.

edit: I did install the driver...