1. View hard disks in your computer by clicking 'Start' and 'My Computer.'
2. Right-click the name of a hard disk under 'Hard Disk Drives' and click 'Properties.'

3. Click 'Tools' in the hard disk's properties window.
4. Open the chkdisk window by clicking 'Check Now.'
5. Click both checkboxes in the window, 'Automatically Fix File System Errors' and 'Scan For and Attempt Recovery of Bad Sectors.'
6. Scan for and fix disk errors by clicking 'Start.'
7. Click 'Yes' if you're asked to restart your computer, then click 'Start,' 'Turn Off Computer' and 'Restart.' Windows fixes disk errors after restarting.