That like trying to answer how long a piece of string is. Theres millions of variations on whats on people machines. The only thing is to have a good firewall, a good antivirus, a good anti spyware (especially for this incident) but most off all a good scecurity process. And run it regularly.
Don't open stuff you don't know. Don't accept cold callers. Only let people you trust near your computer. Clear or secure all personal data when you don't need it. Clearing browsers after using them, clearing history and cache. CCleaner does this for you, but its also how your browser is configured. Don't let the browser save your bank logins etc.
Have a ggod password policy, don't have them all the same, and don't make them simple to crack. Don't use the same pin everywhere.
Don't open stuff you don't know. Don't accept cold callers. Only let people you trust near your computer. Clear or secure all personal data when you don't need it. Clearing browsers after using them, clearing history and cache. CCleaner does this for you, but its also how your browser is configured. Don't let the browser save your bank logins etc.
Have a ggod password policy, don't have them all the same, and don't make them simple to crack. Don't use the same pin everywhere.