I had the same issue with Comodo, the way to fix that is un-install Comodo Internet Security and go to the registry and do the following
Run regedit, go to this value
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Network
On the right side you will see
MaxNumFilters REG_DWORD change it's value from 1 to 8. Reboot your machine and then install CIS, everything works just fine thereafter.
Hope that helps, for me I actually deleted the key, only found that above solution after the fact. But Comodo Internet Security is working fine for me know.
If you don't have the above DWORD, you can simple create a new one by right click selecting New \ DWORD name it
MaxNumFilters and change it's value to 8.
well I got done updating, and so far "most" of the stuff is there, I have a lot of stuff to go through to test if it actually does work. I know for sure my HP graphics driver for W8 doesn't work, it disabled my Radeon 7690 m xt, and now device manager says its a 6700 series, with a yellow question mark. so all I have now is the Intel 3000 thing.
Also my COMODO security suite won't load right, tried to re install and now it won't even do that. that's 2 items so far.
For a bit I thought Fire Fox was hosed too, but it came back, but is slow to start up.
I may end up re installing my W8 image, I dono, we'll see. I just hate to go through the damned update time again later though, sure need a ISO, smirks.
edit
btw that windows 7 recovery image backup program is gone in 8.1 too. luckily Acronis 2010 still works.