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How to Fix Low Disk Space on Windows

Running out of disk space on C: drive? Free up storage on Windows 10 and 11 by cleaning temp files, Windows Update cache, and finding large hidden files.

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Main Troubleshooting Guide

How to Fix 100% Disk Usage →

Complete symptoms, causes, and step-by-step solutions

Symptoms

You might be experiencing this problem if you notice:

  • •Low Disk Space warning notification
  • •C: drive showing red in File Explorer
  • •Can't install Windows Updates due to low space
  • •Programs failing to save files
  • •System slowing down as disk fills up
  • •Unable to download or extract new files

Common Causes

  • âš Windows Update cache consuming gigabytes
  • âš Temp files accumulated over months/years
  • âš Large programs installed on C: drive
  • âš Recycle Bin holding deleted files
  • âš System Restore points using significant space
  • âš WinSxS component store growing over time

Solutions

Solution 1: Run Disk Cleanup with System Files

  1. 1Press Windows + R, type cleanmgr
  2. 2Select the C: drive
  3. 3Click "Clean up system files" button
  4. 4Check all boxes, especially:
  5. 5- Windows Update Cleanup
  6. 6- Previous Windows installation(s)
  7. 7- Temporary files
  8. 8Click OK and confirm deletion

Solution 2: Enable and Configure Storage Sense

  1. 1Go to Settings > System > Storage
  2. 2Turn on "Storage Sense"
  3. 3Click "Configure Storage Sense"
  4. 4Set it to run "Every week"
  5. 5Enable "Delete files in Recycle Bin after 30 days"
  6. 6Enable "Delete files in Downloads folder after 30 days"
  7. 7Click "Clean now" for immediate effect

Solution 3: Find and Remove Large Files

  1. 1Go to Settings > System > Storage
  2. 2Click "Show more categories"
  3. 3Review each category to find space hogs
  4. 4Click "Temporary files" and remove what's safe
  5. 5Click "Other" to find large unknown folders
  6. 6Move large media files to an external drive
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