simplest first.
imgburn is (would you believe) burning software .... it works in a different way to most of the mainstream ... so it's a good way to see if the drive is there.
support ... it's well hidden
http://benq.co.uk/support/ ;-)
bios .... when the machine starts up ... you probably get lots of messages scrolling up the screen (this is the bios)
you can either try to spot the DVD entry
or .... to get into the bios ... unfortunately isn't standard ... but normally when you switch on you will get a message that says
press ...
f2 or del or something or other to enter setup
press whatever it says .... and you're in... (BE VERY CAREFUL - if in doubt exit WITHOUT saving changes!!)
some where should be the HDD, CD/DVD, memory and all the other bits..... at least the bits that the bios can see (so if your drive is there .... it's windows causing the problem.
in windows ... open the start menu
open control panel
on the left you will see a link saying ....
switch to classic view - click on it
lots of icons!!!
open the "system" option
look at the top of the window - click hardware
now press the device manager button
look for the "DVD/CD-Rom drives" branch and click the "+"
single click the benq drive (if it's shown)
press delete ... confirm.
shut the machine down .... then re-start
see if the drive is detected.
if you fancy a walk on the wild side ... download
http://www.zhangduo.com/UnknownDeviceIdentifie r.exe
install .... and see if the drive is listed