thanks stormy13,

I did what you told ...but unfortunately nothing changed...I still couldn't see the device nvidia on device manager..
I made tons of search but I couldnt find a solution so I...

AthanasianCreed
,thanks for your reply,

I did it a couple of days ago but I did after your reply once more.

Unfortunately same error " No device detected"...

Dear friends ,
I upgraded my old pc (which is a compaq presario f505ea) to windows 10...Everything is ok but display is a " microsoft basic display" on device manager altough it's a geforce 6100...