How to find duplicate files on Windows

Complete guide with multiple methods and troubleshooting

7-10 min read
Expert Verified
Last Updated: August 2025

Quick Answer

Finding duplicate files on Windows can be accomplished using various methods, including built-in tools and third-party software. This guide provides detailed steps for each method to help you efficiently identify and manage duplicate files.

Medium⏱ 7-10 min read

Prerequisites & Requirements

Before starting the process of finding duplicate files, ensure you meet the following requirements.
  • •Operating System: Windows 10 or Windows 11.
  • •Administrator permissions may be required for certain tools.
  • •Access to the folders or drives where you want to search for duplicates.
  • •Backup important data before proceeding to avoid accidental deletion.

Method 1: Using File Explorer Search

This method is suitable for users who prefer built-in Windows tools without installing additional software.
  • •Step 1: Open File Explorer by pressing `Windows + E`.
  • •Step 2: Navigate to the folder you want to search for duplicates.
  • •Step 3: In the search bar at the top right, type `*.*` to display all files.
  • •Step 4: Click on the 'View' tab in the ribbon and select 'Details' for better visibility.
  • •Step 5: Click on the 'Sort by' option and choose 'Name' to group files with the same name together.
  • •Step 6: Manually review the grouped files to identify duplicates.
  • •Step 7: To verify, right-click on a file and select 'Properties' to check file size and date modified.
  • •Step 8: If duplicates are found, delete the unnecessary copies.

For Windows 11

Windows 11 users will find a slightly updated interface.
  • •Step 1: Open File Explorer by clicking the folder icon on the taskbar or pressing `Windows + E`.
  • •Step 2: Use the new 'Search' feature in the top bar to filter results by file type or date.

For Windows 10

Windows 10 users can follow the same steps as outlined above, with a slightly different layout.
  • •Step 1: Open File Explorer and navigate to the desired folder.
  • •Step 2: Use the search bar to filter files by typing `*.*`.

Method 2: Using Third-Party Software

Third-party applications can automate the process of finding duplicate files, making it more efficient.
  • •Step 1: Download and install a duplicate file finder tool such as 'CCleaner' or 'Duplicate Cleaner'.
  • •Step 2: Open the application and select the folders or drives you want to scan.
  • •Step 3: Choose the criteria for identifying duplicates (e.g., file name, size, content).
  • •Step 4: Click on the 'Scan' button to start the search.
  • •Step 5: Review the results presented by the software, which will list duplicate files.
  • •Step 6: Select the duplicates you wish to delete and click on the 'Delete' button.

Troubleshooting Common Issues

If you encounter issues while searching for duplicate files, refer to the following solutions.
  • •Error: 'No duplicates found' - Solution: Ensure you are searching in the correct directory and that files are not hidden.
  • •Issue: 'File Explorer not responding' - Fix: Restart File Explorer by right-clicking on the taskbar, selecting 'Task Manager', finding 'Windows Explorer', and clicking 'Restart'.
  • •Problem: 'Duplicate Cleaner not scanning' - Workaround: Check if the software has the necessary permissions to access the folders you selected.

Advanced Tips & Shortcuts

Enhance your efficiency with these tips and shortcuts.
  • •Keyboard shortcut: `Ctrl + Shift + N` - Create a new folder quickly to organize files.
  • •Command line: `dir /s /b | sort | uniq -d` - Use this command in Command Prompt to find duplicate file names.
  • •Hidden feature: 'Storage Sense' - Access this feature in Settings > System > Storage to automatically free up space by removing duplicate files.

Common Mistakes to Avoid

Avoid these common pitfalls:

Expert Tips

Using dedicated software is often the most efficient way to find and manage duplicate files, especially for large libraries.