If you are using Windows XP and you wish to remove a virus or adware, the free application called 'En-Easy' is the best option to go for. This application is easy to use and will be able to scan through your system and remove any infections from your system. To use this software, you will first need to download the program and install it on your computer. It is recommended that you download the program from the internet as it will be able to update the program whenever there are updates to the program which you can download.
When you have installed the program, you will then need to install it on your computer by right clicking the program and then clicking install. Once you have done this, you will then need to ensure that your computer is able to connect to the internet and then download the program onto your computer. It is also recommended that you run the program daily to ensure that it can keep your computer virus free.