However, on x64 platforms kernel-mode rootkits do not feel so at ease, both on x86 systems. This is one of the factors to choose the method of infection computer - infected MBR. Another factor is that most modern anti-virus technologies, primarily anti-rootkit technology, not ready to deal with threats to the x64 platform, and it strongly makes life easier for virus writers.

"Armed to the teeth» TDL-4 is a very serious danger to users - and continues to evolve. Antivirus companies urgently need to build upon their own anti-rootkit components, as in the case of a rootkit infection data for ordinary users will simply leave no chances.

http://www.securelist.com/ru/analysi...674/TDSS_TDL_4

Why do I get the feeling x86 systems are really fecked going forward?