Anti-Virus Software - Install an Anti-Virus application and make sure to update it daily. A
full virus scan should be scheduled to run at least once a week.

Windows Updates - Keep your Operating System up-to-date. Microsoft Windows has a Windows Update website for Windows XP or earlier. Windows Vista & Windows 7 have a built in Windows Updates feature accessed from the Windows button.

Phishing - Always be weary of opening emails from people you dont know. Unsolicited emails pretending to be from your bank could contain links prompting you to part with personal information including usernames, passwords or bank account information. This is known as Phishing.

SPAM - Be careful who you give your personal information to. Freely parting with your email address on social networking or unfamiliar websites can result in increased volumes of spam email to your mailbox. Once these "spammers" have your address there is little your can do to prevent them sending more and more emails. Its these emails that can often contain links to infected websites or attachments.

Telephone Scams - If someone rings you pretending to be affiliated with a particular company (Bank, PayPal, Microsoft, Virus Software companies, etc) and claim to know information about you, the chances are that they simply have your telephone number and are "phishing" for more information, going on the answers you give to their questions.

Best practice would be to hang up...simply giving out your Date of Birth and Email Address could be enough information to reset your Online Banking password!

Other recent phishing scams include the caller pretending to be from a well known software provider or anti-virus company, informing you that you have a virus, claiming to be able to remove it either by you allowing them to remote control your laptop or computer, or by paying a fee over the phone.

Installing their software (a Key Logger) will result in all your key presses and computer usage being logged and sent back to them.  If you do your banking online, your bank login details would almost certainly be logged.

Paying the removal fee will mean that you have given out your bank name, credit/debit card number, expiry date, security number, and possibly your PIN, allowing them to clone your card for future withdrawal.