Hi richm
What is the exact Model No. of your HP device - that will be printed on a sticker on the bottom casing . ..
Open Device Manager (accessible by right clicking your Start Button)
Right click that device and choose properties
On the Details Tab, change the 'Property' drop down to 'Hardware ID's'
Right click the top line in the resulting list and choose 'Copy'
Paste that into your next post . . .