Like so many others, I've found that my QC35s no longer work with Windows 10. The problem started a few weeks ago with Build 1709 and continues today after I've updated to Windows Build 1803. I am using the most common Broadcom USB dongle sold by Amazon. The dongle is installed on a Dell workstation. The headphones connect flawlessly to my Note 8. They appear in my Windows bluetooth list. They are paired, according to my PC. But they do not connect to the PC. The headphones do not acknowledge the connection. No little voice tells me they've been paired. I've downloaded the app on my Note 8, thinking that perhaps that might give me a clue. It doesn't. There are no listings for my PC even though my PC recognizes the headhphones. I've updated drivers. I've scoured the web for solutions. I've reset the headphones. I have, in short, done it all.
This problem has been listed repeatedly in the forums on Bose and elsewhere. What's up? Why does this problem, which has been reported repeatedly over the past year or more, continue to exist? I'm finding my purchase of these headphones to be a major mistake. It's too late to return them, but I'd do it in a heartbeat.
I should add that I'm a loyal Bose customer. I've purchased four Bose products for myself and a few more for members of my family. This makes me question that loyalty. It's a problem that should have been addressed long ago.