Re: QC35 Terrible Bluetooth Connection with MacBook Pro
sounds to me that your particular bluetooth hardware is currently not communicating properly with you Bose QC35ii via Windows.
If you have not already done so:
1. Try the QC35ii with a smartphone or another device to insure there is nothing wrong with the Qc35ii.
2. You have up to date bluetooth drivers from your vendor -- according to you that does not seem to help. So now try uninstalling them and reinstalling. Then try getting you hands on previous drivers and go back up to 2 years if you can.
3. Intel on its bluetooth site for win7 says that two windows updates could be incompatible. Even though you have win 10, make sure you don't have those installed. Then uninstall windows updates back up to 2 years to see if any of that helps.
If 1 to 3 make no difference and with everything else you have tried, especially if your Bluetooth vendor is Intel (which many of us know plain doesn't work well with any Bose stuff) or even if its not, your only short term fix will be to disable your bluetooth hardware in windows and go with another vendor. Bose just has too many vendors to test with for windows and mac machines and so it is highly unlikely you will see a firmware fix that specifically addresses your environmenty.
After you have disabled the BT hardware, buy a USB Dongle. I have found success for $12 on ebay with the SMK Nano USB Dongle with CSR drivers. Can't say if it will work for you or not since I have win 7/64. But for $12.... you can afford to try another if it doesn't work.... or you can wait for Bose.... or you can sell you Bose... you get the idea....