E-Banking on a Locked Down (Non-Microsoft) PC
"...malware that is built to steal data from Windows-based systems simply won't load or work when the user is booting from LiveCD. Even if the Windows installation on the underlying hard drive is completely corrupted with a keystroke-logging virus or Trojan, the malware can't capture the victim's banking credentials if that user only transmits his user name and password after booting up into one of these Live CDs.

Brian Krebs - Security Fix - Washington Post


Also, read Brian Krebs article: Avoid Windows Malware: Bank on a Live CD
An investigative series I've been writing about organized cyber crime gangs stealing millions of dollars from small to mid-sized businesses has generated more than a few responses from business owners who were concerned about how best to protect themselves from this type of fraud.

The simplest, most cost-effective answer I know of? Don't use Microsoft Windows when accessing your bank account online.