no one has a solution I thought it was a common problem

I thought it was a common problem

If it's as common as you seem to think, I assume there must be other threads/posts on the subject?

What suggestions are offered in those?

Did you check for any potential problems using Dell's 'Upgrading from Windows Vista to Windows 7 Using the Dell Upgrade Assistant', before upgrading to Windows 7?

Have you tried reinstalling/updating the Windows 7 64bit drivers for the particular bluetooth card (listed under 'Network') in your Studio [XPS] 1645?

examples:http://en.community.dell.com/forums/t/19303880.aspx
http://en.community.dell.com/forums/p/19309326/19607549.aspx#19607549

i'm starting to think dell just didn't put it in...I hav'nt actually used the device when I was on vista just saw the icon on the start menu but doesn't it automatically come with it all the studio xps series

I cant find any recent posts but their are a bunch in the past like 2-3 months but theirs no solutions in them it works for some and others it does'nt

and I can't reinstall it if I cant turn on the Bluetooth adapter on windows I tried the vista 64bit and the win 7 drivers (but their the same thing) and its not listed under networks. My bios has it enabled but its just not working