Even if it was only you who was using your computer still you need a software that you can use for the protection. Protection that we do know which is the anti virus, software that can defect the virus who wants to enter your software. If you are using the computer connected with the internet it is much important that you got the anti spyware for it. To be sure that the document that you are keeping on your computer are protected. There are many ways on how can a virus enter your computer. Either it will be from the devices that you are inserting to your pc, such as memory card, usb flash disk, cd and different removable device. Also internet can also be harmful to your pc if you didn’t have the internet security fully protected. You can visit the site on my post where you can find a site that offer anti virus, and also have a trial download that you can have for free.