Then after doing the start up 8.1 initial settings and a reboot I went back in MSConfig and enabled all services that I disabled previously. And also, plugged back in my external USB devices.
I recently had to do another OS install on the same machine (Asus G73JH Laptop) as I meantioned above... but no go this time.
What worked for me this round was
1. Clean Win 8 Install
2. Did just one round of windows updates... 90+ then tried the store 8.1 update link button.
3. After the store download message turned from downloading to installing... I hit the win key to jump into the start menu screen and typed in control panel ... then opened the device manager and manually disabled all network items... wireless, lan, etc.
4. Then went into control panel devices and printers and removed my printer...may not be necessary.
8.1 installed with no issues. I never did update my drivers before the installation. Then after the update, I enabled all networking and updated everything.
I also updated my G750JS that uses Broadcom drivers without jumping through any hoops... so it may just be the QUALCOMM drivers used on my G73JH. ...Or something completely different.
Hope this helps,