I have just bought a refurbished Dell Latitude laptop. Three days after the warranty expired (of course), we discovered a virus in System Restore files. We were told to reduce the space allotted for Sys Res and that would remove the virus. The problem is that the computer will not let us change the size allotted. When we uncheck "Disable System Restore" and go back to the screen where the size allotted is, that section is still "grayed out". If we go back to the "troubleshooting" page, the "disable..." box has rechecked itself. Anyone know what we can do?