If you open, download or accept files or emails from people you don't know they may contain viruses which damage your computer or attachments which may include unpleasant pictures or links to inappropriate websites.

If you do give out a lot of personal information about yourself when you sign up to join something online or when you enter a competition you may find that you are then bombarded with SPAM or junk mail. If you have a web mail account you are more likely to get junk mail. Being SMART online means making sure that you are careful about knowing how to filter junk email and blocking individual senders in your email software programme.

Be very careful not to open attachments from people or organisations that you don't know and make sure you have an anti-virus software protection system on your computer which is updated regularly. This is not only to protect you from receiving viruses but also to stop your machine from passing viruses onto others by mistake.