I bought a new computer a few months ago but since last two weeks, it is randomly freezing. Most of the time, it freezes for about for 10-15 minutes but other times a hard restart is required. I even disabled some programs from running when the computer boots up such as Skype and that fixed it for about a week but now again it is causing the same issue. I even tried full scans with Microsoft Security Essentials and updated all my drivers and software. I do not think it is a graphics card issue but I am not able to fix this issue. Please help me out.