Windows 7 is widely used Windows operating versions in the World. Most of the computer users use this version of OS to complete personal or professional tasks. However, you may also get some issues during the installation of Windows 7 or after installing this OS on your computer. When you try to open any application or when you are doing certain jobs on your Windows 7, you may face Windows 7 is unstable problem. After getting this issue, you cannot work on the computer properly and the computer becomes stuck or freeze. So, to fix Windows 7 unstable issue in the computer, you should go through some manual method or you can also use Advanced System Repair tool in your PC to fix the problem.