Running ScanDisk & Defrag

Keywords: defrag, defragment, scan, hdd, hard drive

For the Mac equivalent, visit our Repair Disk Permissions and Repair Disk guide.

You should run ScanDisk and Disk Defragmenter regularly to keep system file management at peak performance. First, make sure you have closed all background applications as they may cause ScanDisk & Defrag to malfunction.

Please make a selection from the dropdown menu above.

ScanDisk

 
Windows XP
  1. Double-click My Computer.
  2. Right-click the hard drive you want to scan.
  3. Click Properties.
  4. Select the Tools tab.
  5. Under Error-checking, click Check Now.
  6. Select Scan for and attempt recovery of bad sectors and Automatically fix file system errors.
  7. Click Yes to schedule after the restart.
  8. Restart your computer to run the scan.
Windows Vista/Windows 7/Windows 8
  1. Click the Start button (Windows Key + Q in Windows 8).
  2. Click Computer.
  3. Right-click the hard drive that you want to check.
  4. Click Properties.
  5. Select the Tools tab.
  6. Under Error-checking, click Check Now.
  7. Select Scan for and attempt recovery of bad sectors and Automatically fix file system errors.
  8. Select Yes to schedule after restart.
  9. Restart your computer to run the scan.

Defrag

 

Note: Do not perform disk defragmentation (defrag) on Solid State Drives (SSD) as it may cause permanent damage to the drive. If you are unsure what type of disk drive you have, consult your PC manufacturer.

Windows XP
  1. Double-click My Computer.
  2. Select the hard drive you want to scan.
  3. Click File.
  4. Click Properties.
  5. Click the Tools tab.
  6. Click Defragment Now.
  7. Select the volume to defragment.
  8. Click Defragment.
Windows Vista/Windows 7/Windows 8
  1. Click Start (Windows Key + Q in Windows 8).
  2. Select Computer.
  3. Right-click the hard drive that you want to check.
  4. Select Properties.
  5. Click the Tools tab.
  6. Under Defragmentation, click Defragment Now.
  7. Select the volume to defragment.
  8. Click Defragment.

System File Checker

 

Run the System File Checker to scan for damaged or missing files in Windows.

Note: This command may require access to the Windows installation source files.

Windows Vista/Windows 7

You will first need to open an elevated command prompt window.

  1. Click Start.
  2. Select All Programs.
  3. Under Accessories, right-click Command Prompt.
  4. Click Run as Administrator.
  5. If you are prompted for an administrator password or for a confirmation, type the password or click Allow.
  6. In the Command box, type sfc /scannow.
  7. Follow the prompts to check the integrity of your files.

Windows 8

  1. Windows Key + Q.
  2. Right-click Command Prompt.
  3. Select Run as administrator.
  4. In the Command box, type sfc /scannow.
  5. Follow the prompts to check the integrity of your files.

Windows XP

  1. Click Start.
  2. Go to Run.
  3. In the run box, type sfc /scannow.
  4. Follow the prompts to check the integrity of your files.

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