Windows 7: BSOD - DRIVER_POWER_STATE_FAILURE - error 0x0000009f cause by ntoskrnl

Hi all,
I've been experiencing some BSODs recently and I would greatly appreciate your views on root causes and potential fixes.

For your info: I purchased my system in September 2011 at Digital Storm and started to experience BSODs in November 2011. I reinstalled Windows towards end of 2011 then changed the motherboard in June 2012.

Basis system specs:
- Windows 7 Home Premium 64bit
- OEM
- Hardware from September 2011 except motherboard from June 2012
- OS reinstalled in June 2012 following change of motherboard



Thanks in advance!

Device Concerns:

Code:

Ethernet Controller	PCI\VEN_10EC&DEV_8168&SUBSYS_85051043&REV_09\4&11EB9DBD&0&00E4	The drivers for this device are not installed.
PCI Simple Communications Controller	PCI\VEN_8086&DEV_1E3A&SUBSYS_84CA1043&REV_04\3&11583659&0&B0	The drivers for this device are not installed.
Universal Serial Bus (USB) Controller	PCI\VEN_1B21&DEV_1042&SUBSYS_84881043&REV_00\4&3927C719&0&00E7	The drivers for this device are not installed.
SM Bus Controller	PCI\VEN_8086&DEV_1E22&SUBSYS_84CA1043&REV_04\3&11583659&0&FB	The drivers for this device are not installed.
Universal Serial Bus (USB) Controller	PCI\VEN_8086&DEV_1E31&SUBSYS_84CA1043&REV_04\3&11583659&0&A0	The drivers for this device are not installed.

Prior to getting help, please install the above drivers from your motherboard support site. If you need help, please fill in your system specs in your profile and not in a post in this thread: System Info - See Your System Specs

Many thanks for the feedback.

As requested, I have now updated the above drivers and filled in my system specs.

Nice work! Let us know how the system responds with the drivers installed.

So far so good! I will keep you posted. Many thanks.

Argh! Unfortunately, after few weeks without too much trouble (and less intensive use of my PC) I finally had new BSODs... Attached are the requested information and any help would be much appreciated! Thanks in advance.