The application is able to detect and fix hard drive errors that might appear on system crashes or when switching off your PC without a proper Windows shutdown.
If you ever had a system crash, just try CheckDrive to find any errors on your hard drive and solve it immediately.
CheckDrive is completely free, but requires a free registration. It works well on WindowsXP/Vista/7 and .NET Framework 2 or above required for installation. It can be downloaded at Ablesoft.