I recently tested the popular anti-rootkits in Windows 8 x32.
The video demonstrates that existing tools like PowerTool, TDSSKiller, Xuetr do not allow to detect hide driver. My tool WinKar can detect it!
ATSIV.EXE is Windows tool for non-signed driver installation - http://blogs.technet.com/b/ms_schweiz_security_blog/archive/2007/08/13/windows-vista-64bit-non-signed-driver-install-tool-atsiv-blocked.aspx
To view the video - set HD quality and full screen
General scheme of WinKar and video comments