It is not always obvious when our laptop has been infected by a virus. In some cases, our computer will begin to run slower or pop-ups will appear without explanation, but sometimes viruses may sit dormant within our computers for an extended period of time. A virus on your computer can pose a serious security risk to your data and personal information so it is important that you do not ignore it. Here are a few tips regarding how to remove a virus from a PC or a computer.