People don't think about efficiency when the computer is first bought. It's fast and over time once a fast moving computer turns out to be a slow moving turtle. Bring the computer back to the way it once was by following some optimization guidelines. Doing this will increase computer speed, safety and smooth operation.
It starts with cleaning the computer from viruses. Viruses, spyware and other threats slow the system down in addition to destroying it. Even harmless ones like cookies affect computer performance because the risk of confidential information can fall into the wrong hands. Get anti-virus and anti-spyware tools to scan and rid threats from your dell PC. There are free and paid options available. It is important that the computer is protected from outside threats.