Bluetooth problem

Have you already installed the latest drivers??

I had the same problem and this is the solution(for XP Proffesional but maybe it works for the others):

Uninstall all the HP Bluetooth software from Control Panel/Add or Remove Programs
Then install the software from HP
1) HP Wireless Assistant link http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareDescription.jsp?lang=en&cc=us&prodTypeId=321957&prodSeriesId=447346&prodNameId=447347&swEnvOID=1093&swLang=8&mode=2&taskId=135&swItem=ob-38789-1
2) Software Support for HP Integrated Module with Bluetooth Wireless Technology link http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareDescription.jsp?lang=en&cc=us&prodTypeId=321957&prodSeriesId=447346&prodNameId=447347&swEnvOID=1093&swLang=8&mode=2&taskId=135&swItem=ob-48231-1

The order is very important.
After the first step it you will have a tool to turn the device on(but in this step you will see that is imposible because the device is not instaled).After the second step in my case the bluetooth drivers was installing succesfull.

If this is not working try first this:
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&objectID=c00711848
After you modify the bth.inf restart the computer then try all from above.
Good luck!!!!