Forum Discussion
Finneganb
Mar 01, 2026Copper Contributor
How do I check what is eating my C drive space on windows 11/10?
Hi, I have a Windows 11 laptop and Windows 10 PC. Both computers's C drive is completely full and I have no idea why. I'm not very tech-savvy and need a simple, step-by-step explanation on how to ch...
Komondor2240
Mar 01, 2026Iron Contributor
Windows Disk Cleanup is a free, built-in Windows utility designed to safely remove unnecessary system and temporary files. It helps you quickly analyze storage usage and effectively answer What is eating my C drive space without installing any third‑party software. With its simple interface and reliable functions, it can safely delete junk files that take up large amounts of space on your system drive.
- Enter Disk Cleanup in the Start menu search box
- Click Disk Cleanup, select the C: drive → click OK and wait for space usage to be calculated
- Tick the following options:
- Temporary Internet files
- Temporary files
- Recycle Bin
- Delivery optimisation files
- Click Clean up system files
- Select the C: drive again. Additional options will now appear:
- Windows Update cleanup
- Windows Defender antivirus
- Previous Windows installation files
- Tick the items to be deleted → click OK
Windows Disk Cleanup is the most convenient and secure solution for optimising your C drive. It safely and efficiently removes redundant system files and temporary data, helping you clearly understand What is eating my C drive space while effortlessly identifying and resolving issues causing space to be occupied on your C drive.