Antivirus programs limited functionality in Windows 8 64bit

After reading this post and getting a virus (with NIS 2013) a couple months ago that used code injection, how many other antivirus programs have limited features, limited functionality, due to the Windows 8 Kernel? Why are most AV companies not being up front with their customers?

Related: https://www.wilderssecurity.com/showthread.php?t=341736
Is this still true for Norton 2013, as of 07/18/13?

What about Mcafee 2013, Kaspersky 2013, Webroot 2013, Avira 2013 and more?

Some more info:
-Mcafee, http://home.mcafee.com/Root/StdLandingPage.aspx?Lpname=win8_defender
-click FAQs
"Windows 8 includes a few security features that offer basic protection."
https://kc.mcafee.com/corporate/index?page=content&id=KB75672

-Webroot Identity Protection did not detect keyloggers or screen capture

-Avira post as of May 2013,
http://forum.avira.com/wbb/index.php?page=Thread&postID=1246925&highlight=proactiv#post1246925
"...however, yes, the rootkit-scanner is useless..."
"...the "mail protection" module does not handle web-traffic..."
"...if you want to use "proactiv", you will need to use a 32-bit version of windows.."

-Kaspersky failure to detect rootkits. Time: @00:26
http://www.youtube.com/watch?v=0StHhSmQwxA

If anyone has more information on this, please share it on this thread. Thank you

 

Re: Antiviris programs limited functionality in Windows 8 64bit

Yes, it is. I doubt that will change soon. They said they are supporting 64 bit Outlook with their antispam plugin for the 2014 version, but that is still in beta and I haven't seen any info on whether the OS support will improve.

 

I installed the 21 Beta of Norton and the help files still mentions it. We will see if it changes or if the help files are out of date.