I am using Windows 7 and a Dell Optiplex 9030 computer with 4 GB hard drive. Although I do not have much loaded on the system, the system says I have only 250 MB of space. Something is restricting the use of the hard drive. Additionally, our antivirus software cannot update. The hard drive appears to be infected with a virus. How do I confirm this and how do I remove it to regain access to full use of the hard drive?
