Your hard disk won’t run optimally if there are bad sectors on it. Sectors are where data is stored, and if any sectors are damaged and you try to write data to them, you’re going to run into problems. To scan for bad sectors on the hard drive, use the error-checking tool in My Computer:
1. Close all running programs, and from the Start menu, click Open My Computer.
2. Right-click the disk you want to check for errors and click Properties.
3. Click the Tools menu, and under Error-Checking, click Check Now.
4. In the Check Disk dialog box, check Automatically Fix File System Errors and Scan For And Attempt Recovery Of Bad Sectors. Click Start.
5. You’ll most likely be prompted to restart Windows and let the error checking run on reboot. Click Yes to reboot, and then click OK.
After the computer boots up, the CHKDSK utility will run. Wait while Windows finds and fixes the hard disk problems. This might take a while, and your computer will be unavailable during this process.