BSOD only on cold start up, then restarts.

All hotfixes are important.

Possibly, but it could also be that the USB drivers (not USB network drivers) are just old.
Please check Intel for driver updates for the USB drivers
Drivers & Software

Code:

3: kd> lmvm iusb3xhc
start             end                 module name
fffff880`04215000 fffff880`042da000   iusb3xhc   (deferred)             
    Image path: \SystemRoot\system32\DRIVERS\iusb3xhc.sys
    Image name: iusb3xhc.sys
    Timestamp:        Wed Feb 12 12:04:33 2014 (52FB5541)
    CheckSum:         000C82CE
    ImageSize:        000C5000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4

3: kd> lmvm iusb3hub
start             end                 module name
fffff880`05c34000 fffff880`05c94000   iusb3hub   (deferred)             
    Image path: \SystemRoot\system32\DRIVERS\iusb3hub.sys
    Image name: iusb3hub.sys
    Timestamp:        Wed Feb 12 12:04:30 2014 (52FB553E)
    CheckSum:         0005CEC1
    ImageSize:        00060000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4

Stupid me, I keep forgetting that USB drivers are available from the motherboard manufacturer
GIGABYTE - Motherboard - Socket 1150 - GA-Z97X-Gaming 5 (rev. 1.0)

Yes on both questions.
If you already installed them it is a good option to reinstall in case of corruption.

Depends on if Windows Update is up to date (exception for Windows 10 update)
If Windows Update is up to date then yes.

Update Windows and (re)install the USB drivers for now.
If that doesn't help then run Magician as Laith suggested.
If Magician comes clean, good, positive or something in that way then I would suggest to focus on the USB network adapter:

• using another USB port or
• don't use the USB network adapter or
• update/reinstall the drivers