Most of us will wash our hands before sitting down to eat.
However, when it comes to using public computers such as ones found in libraries or at airport kiosks, are we equally concerned about cleanliness? You have no idea of what bad things may be lurking there–either in the hardware or the software.
In particular, be very cautious about accessing personal accounts from computers at locations such as these. It’s both possible—and probable—that these systems have been compromised, and your personal information could be at considerable risk.
In terms of online banking or shopping using your credit card, avoid doing so from a public computer. Even conducting such activity from a friend’s computer could be risky if they have not taken proper precautions to protect their system and keep security patches up to date.