Before you try to get rid of the virus, make a backup of your important files. There's a chance you won't be able to remove the virus and will have to restore your computer to its factory state, so make sure you backup all of your files, like documents, photos, music and video, and databases. Make a backup by connecting an external hard drive to your computer and dragging your files onto it.
After backing up your files, download MacAfee AntiVirus Plus and run it on your system to clean it of viruses. You can download a 30-day trial version to see if it works. Other Anti-Virus programs are fine too, but I've found MacAfee to be the best. Plus it's free.
If MacAfee works and the viruses are gone, you should be all set. If MacAfee fails and the virus is still there, find the setup DVDs that came with your computer to restore it to its factory state. Once your computer has been restored, re-install your programs, and then copy your backed-up files back on to it.
To prevent viruses from getting onto your computer, the most important step you can take is to avoid Microsoft's Internet Explorer browser. Use Firefox instead. Also, be careful with installing programs from the internet. Do not allow a web page to download or install software on your computer unless you're sure it's safe.
It is important to remove viruses. Once one has infected your system, it can record every key stroke you type, including your passwords.
