One of the nastiest computer viruses out there is the Sality virus, which is a virus that allows hackers to remotely access your computer, steal information, download additional viruses into your computer, and cause your computer to perform at a low level. If your computer is infected with this virus, you will notice that it runs slowly, has less available memory, and that you are being flooded with pop-up ads. This virus can also alter your desktop settings and Internet settings. It is important to eradicate this virus as soon as possible after you detect that it has invaded your system. Usually, the sality virus is downloaded via email.