So I was pulling my hair out all evening because I bought this nice Plantronics 975 and could not use it for Skype on my MBP running Windows 7 64 bit. Long story short. I got it working. Took some heaving digging. Hope this helps some people.
Install these drivers from Lenovo.
http://www-307.ibm.com/pc/support/site.wss/document.do?lndocid=MIGR-70042
Change this registry key from 0 to 1. This prevents the bluetooth stack from crashing. You won't be able to answer and hang up with the buttons on the headset but if you don't do this you will have to restart your computer every time you turn the headset off.
HKEY_CURRENT_USER\Software\Widcomm\BTConfig\General\DoNotIntegrateSkype
That was it. Now I can pair the headset with the iPhone and Skype and use them at the same time.
Install these drivers from Lenovo.
http://www-307.ibm.com/pc/support/site.wss/document.do?lndocid=MIGR-70042
Change this registry key from 0 to 1. This prevents the bluetooth stack from crashing. You won't be able to answer and hang up with the buttons on the headset but if you don't do this you will have to restart your computer every time you turn the headset off.
HKEY_CURRENT_USER\Software\Widcomm\BTConfig\General\DoNotIntegrateSkype
That was it. Now I can pair the headset with the iPhone and Skype and use them at the same time.