Windows Maintenance and Troubleshooting - Utilities and Commands

Here’s a list of the utilities and commands, which are helpful for system maintenance and troubleshooting in Windows:


1. System File Checker (SFC)

  • Command: sfc /scannow
  • Purpose: Scans and repairs corrupted or missing Windows system files immediately.
  • How to Use:
    1. Open Command Prompt as an administrator.
    2. Type sfc /scannow and press Enter.
    3. Wait for the scan to complete. It will automatically fix any issues it finds.
  • When to Use: If you encounter errors like crashing apps, missing DLLs, or unexplained slowdowns.
  • Command: sfc /scanonce
  • Purpose: Scans and repairs corrupted or missing Windows system files at the next boot.
  • May offer a cleaner scan compared to /scannow.


2. Disk Cleanup

  • Command: cleanmgr
  • Purpose: Frees up disk space by removing unnecessary files such as temporary files, system cache, and old Windows updates.
  • How to Use:
    1. Open Disk Cleanup from the Start Menu.
    2. Select the drive you want to clean (usually C:).
    3. Choose the file categories to delete and click OK.
  • When to Use: If your storage is low or you want to declutter your system.


3. Check Disk (chkdsk)

  • Command:
    • chkdsk /f: Fixes errors on the disk.
    • chkdsk /r: Locates bad sectors and attempts to recover readable information.
  • Purpose: Checks the hard drive for errors and repairs them.
  • How to Use:
    1. Open Command Prompt as an administrator.
    2. Type chkdsk /f or chkdsk /r and press Enter.
    3. Restart your computer if prompted.
  • When to Use: If you suspect file system corruption, bad sectors, or experience slow performance.


4. Temp Folder

  • Location: C:\Windows\Temp or %TEMP%
  • Purpose: Stores temporary files created by applications. These can be safely deleted to free up space.
  • How to Use:
    1. Press Win + R, type %TEMP%, and press Enter.
    2. Select all files in the folder and delete them.
  • When to Use: Periodically, especially when disk space is low.


5. Temporary Internet Files

  • Location: Stored in browser cache.
  • Purpose: Contains cached data from websites to speed up loading times. Clearing it can resolve browsing issues.
  • How to Clear:
    • In Chrome: Go to Settings > Privacy and Security > Clear Browsing Data.
    • In Edge: Go to Settings > Privacy, Search, and Services > Clear Browsing Data.
  • When to Use: If web pages are loading incorrectly or to protect privacy.


6. Disk Defragment

  • Command: dfrgui or defrag
  • Purpose: Optimizes the arrangement of files on the disk for faster access (for HDDs, not necessary for SSDs).
  • How to Use:
    1. Open Defragment and Optimize Drives from the Start Menu.
    2. Select the drive to defragment and click Optimize.
  • When to Use: Periodically for HDDs to maintain performance (not applicable to SSDs).
  • Note: If more than 15% free space in the drive, use the GUI interface, else use the command-line interface


Best Practices

  • Use these tools together periodically to maintain your system’s health and performance.
  • Always back up important data before running tools like chkdsk or Disk Cleanup to avoid accidental data loss.


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