[bonestonne]

Understandable, and that's totally okay, just wanted to make sure I understood it.

So, to be a little more specific, here's a closer breakdown of when things were resolved:

Update for Windows 8.1 for x64-based Systems (KB2901549) - Improves reliability of IE11 on Windows 8.1 Systems
Update for Windows 8.1 for x64-based Systems (KB2902892) - Resolves Skype crashes with Intel 3000 graphics (not related to my problem)

Those updates were installed, and once those updates were done, I used the Windows Installer Clean-Up Utility to completely remove what was left of Bonjour from the previous install that caused problems. After re-running the installer for EuCon 3.0.1, everything fell into place and started to work correctly again. Simply having the Bonjour service installed and running was causing a BSOD on shutdown/restart/log off.

I suspect that the IE11 update may have also updated some networking components (though I have not looked more in-depth into this) as that's the only change to the system between it working and it not working.

I know my system is more or less completely unsupported, but it looks like the surfaces work very well in Windows 8.1 Pro x64 as my machine is covered. For reference, here are my specs:

2x Intel Xeon E5-2620
Asus Z9PA-D8
2x Xigmatek SD1283 Dark Knight
NZXT Source 210 Elite
Antec HCG-750
Kingston 32gb ECC Registered DDR3
LG WH14NS40 BluRay Burner
Startech PEXUSB3S2E2I USB3.0 PCI-e x1
SIIG NN-E38012-S3 Firewire 400/800 PCI-e x1
Western Digital Velociraptor 250GB HHTZ model
Thermalright HR-55-IFX
Gigabyte GTX660Ti 2gb
1200RPM PWM Scythe Slip Stream (Rear exhaust)
2x Noiseblocker NB-eLoop B12-PS (CPU fans)
Phanteks 140mm White (Top exhaust)
Windows 8.1 Pro with Media Center

PT11 also works very well (11.0.2). The ProFire 2626 works flawlessly, though I haven't used all features yet with this machine. The surfaces work no problem whatsoever in both Pro Tools and Adobe Audition, with limited testing within Reaper.

Thanks for the answers, hopefully this info helps you out if ever needed.