How to install Nexus 6 / 5X / 6P Drivers in Windows 7 properly where fastboot can see it? I have the Nexus 5X drivers installed properly on Win7 64bit and it shows up in my device manager as Nexus 5x. I can verify that it gets detected as I see it in chrome inspect page. But when i try to do a adb devices or fastboot devices, it wont see the phone. what could i be doing wrong? 

And yes I can transfer files when I select MTP mode.
ADB devices was detecting the phone, but fastboot devices wasn't. I had to do the following to get it to work on Win 7 64bit:


Reboot Win7 and Press F8 on boot screen and select: Disable Driver Signing 
Boot phone into bootloader
Device Manager you should see an Unknown Device popup
Manually install the driver by selecting: android > android adb (screenshot)
Then goto command line: fastboot devices 


Let me know if it worked or not. If it did, all I ask is thumbs up this post! I spent a good 3 hours to figure it out. No where on the net has a solution that I've found.