Controller becoming unresponsive periodically

[Libuke]

Hi,
i may have stumbled into a gamebreaking probelm.
Since launch, i was playing on an older PC with Windows Vista, there i had absolutely no problems with FF at all. Roughly one month ago, i got myself a never PC running Windows 8.1 and theat was the day my problem started.

My wireless xBox360 controller seemd to get stuck in inputs i gave periodically. My char keeps moving after i stopt pushing the stick, buttons wont recognice and i cant move, if i am standing still whilte the problem strikes. Its kind of if the controller freezes at the input i give him at that time, not allowing me to do anything while it lasts.

It always comes in 3 short waves bevore i can hope to play for some minutes normally.

I started to try some hints i found googeling, bought two new controllers, wired ones to eliminate the possebillity that something destrubs the signal of the wireless ones. I even conneckted a PS2 controller, using a USB adaptor. But nothing i tried helped.

I found out, that it always happens, when my Device Manager refreshes itself. Everytime it reloads its list, the controller refuses to recognice my inputs.

I allready cleaned the Device Manager from all unused entries, camped it hoping to see something suspicius while it refreshes, but i could not find anything.

The controller works just fine in all my other games and programms, the problem is only present in FFXIV.
I updated and reinstalled the driver for the controller, deactivated the power management for the USB ports and shut off the home network on my PC.

Now i do not know what to do to fix that problem. All posts i found are quite old and didn't help me fix it.