Hold down the Windows key and the Pause/Break key simultaneously to open
up the Control Panel > System and Maintenance > System window. Under
processors it should list 2 CPU if you have 2 cores. (Also, if you
click on the link in the left pane to go to Device Manager, then under
Processors it should have 2 entries if you have a dual core computer.)
As for Bluetooth devices, if that entry is in Device Manager, your pc
supports bluetooth, although none may be installed. You can go to this
Microsoft page to see how to add bluetooth devices to your system:
'Windows Vista Help: Set up a Bluetooth enabled device'
(
http://windowshelp.microsoft.com/Windows/en-US/help/67cdb8d4-c3fe-43d...)