PSA: if you're having issues with your game pad trying swapping between the USB 2 and USB 3 ports.

[shortylickens]

That MIGHT fix it and is a good choice before uninstalling and reinstalling drivers.

My 360 controller (which never had any problems under Windows 7 by the way) was giving me the flashing green lights even though everything worked fine within games.

After doing a BUNCH of work and lots of research, I found out some problems with some older devices can be cleared by going from USB 3 to USB 2.

For most of you this may seem fairly obvious but I was amazed at how little information there is on this subject.
Either that or search engines aint what they used to be.

 

[Rifter]

Yeah, USB3 is supposed to be fully backwards compatible. In practice though i have noticed a few issues that were resolved by putting the device in a USB2 slot just like you did.

 

[jhansman]

Yep, I had a flash drive I was trying to boot from that would not work on my up-front USB 3 ports. Moved it to the back USB 2 and it worked like a charm. Whatever the difference is, backward compatibility is not assured.