A computer virus can make its way onto your computer in many different ways as there are a variety of sources that they can come from. The most common is Emails from people claiming to be from companies, browsing the internet and from a memory stick. Keep this in mind as it’s very important to keep your Antivirus software up to date. If your computer ever gets a virus, it’s important that you get this looked at straight away. Some viruses, can alter, damage and delete files from your hard drive.