[HELP] Computer shuts down devices randomly!

[TFE99]

Sometimes when using my computer it just turns off some of the devices attached to it via usb. This includes, but is not limited to, my keyboard (Razer blackwidow 2013) my headphones (sennheiser pc163d) and my wireless network adapter. This has been going on for some time now, I've tried scanning my entire computer with avast but it found nothing. What should I do?

Here are my computer's specs

Spoiler

Operating System: Windows 7 Professional 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.130828-1532)

System Manufacturer: Gigabyte Technology Co., Ltd.

BIOS: Ver: 04.06.05

Processor: Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz (8 CPUs), ~3.9GHz

Memory: 16384MB RAM

Available OS Memory: 16340MB RAM

Page File: 4479MB used, 28200MB available

GPU: NVIDIA GeForce GTX 670 x 2

Display Memory: 4004 MB

Here is my full dxdiag info:
Link

 

[boosted1g]

Here is two threads with your probelm, The search is there for a reason.

http://www.tomshardware.com/forum/308893-30-devices-keyboard-randomly-stop-working

http://www.tomshardware.com/answers/id-1851310/usb-ports-stop-working-randomly.html


If the info in here does not help you then tell us what you tried that did not work and will try to help you.