Computer viruses, Trojans, malware, spyware, and adware make for terrible intrusions into your computer system. It's a good idea -- and a best practice -- to check your computer for virus regularly since your computer ( or network) is always vulnerable to such intrusions and attacks.

The easiest way to do that is to set-up a schedule each week for regular scanning and removal of virus from your system. If you use a Window’s PC, you can use free virus check and malicious software removal tools that Microsoft provides for free. Make sure that you set-it up to automatically download updates.

In addition to that, invest in reliable anti-virus software and always keep your virus definitions up-to-date. You may also go with popular free anti-virus software such as AVG and others, but remember that you get what you pay for – the free software doesn’t come with everything you need to keep your virus free. Paid anti-virus programs have a difficulty in trying to catch up with the latest virus updates due to the sheer variety and scale of new viruses. Free ones are even worse.