Latitude E4300 : Real user manual and webcam trouble

Hello, (I'm French so, please, excuse my approximate English writing)

I received a second hand Dell E4300 labtop for my daughter (W7 64 bits) and :
- made several tests
- fixed some light issues

- tried to understand how it works exactly without any real user manual apart from a Setup and Quick Reference Guide and a ServiceManual : between both nothing
-> Do you know where I could find one..that isn't..on Dell site Was this labtop delivered with a CD containing drivers, softwares and user manual ? If yes where could I get it ?? (I didn't find this information on any product description I read

- tried to get the webcam working with my non-existent experience of integrated webcam
Driver is correctly installed in the device manager and is the right one but I don't find something about this webcam somewhere else : nothing in the control panel, nothing in programs, nothing on the desktop.

So what have I to do ?
I downloaded this software : DellWebcamSW.exe recommanded for the E4300 under W7 (I don't even remember where I found it on Dell site for the E4300 ) but when I try to install it I get this :"Setup didn't detect any dell Webcam Central Card on your system"....isn't it the right software ??

Thanks in advance for your help I didn't find after many hours searching on the net