OneNote for Windows 10: Full Uninstall Guide for Complete System Cleanup

Uninstalling OneNote from Windows 10 isn’t as straightforward as it should be—Microsoft hides the real uninstaller deep in the system. ⚡ I’ve removed it from dozens of machines, and the key is knowing where to look first.

The built-in "Uninstall" option in the Start menu only removes the app shortcut, leaving behind critical files that bloat your system.

The proper cleanup requires digging into the Windows Apps & Features menu (or Settings) and using the full uninstaller package hidden in the OneNote installation folder. I’ll walk you through both methods—including the PowerShell command that wipes every trace—so you don’t end up with leftover registry entries or broken shortcuts.

This is how you actually remove it, not just hide it.

You’ll end up with a cleaner system, faster startup times, and no lingering OneNote processes in Task Manager. The process takes about 5 minutes if you follow the steps exactly, and I’ll show you how to verify it’s fully gone afterward.

No more accidental notes syncing or background updates hogging your bandwidth.

We’ll also cover what happens if you skip steps (spoiler: it leaves junk behind) and how to reclaim the space OneNote was using. Trust me—this is the method that actually works, not the half-measure tutorials you’ll find elsewhere. Let’s get started.

What you need

How to completely remove OneNote from Windows 10

Here's the foolproof method to scrub OneNote from your system—no leftover files or registry clutter.

Right-click the Start button and select Apps and Features. Scroll down to find Microsoft OneNote in the list. If you don't see it, try searching for "OneNote" in the search bar above.

Click OneNote, then select Uninstall. Windows will prompt you to confirm—click Uninstall again. Wait for the process to complete, which typically takes 30-60 seconds. You'll see a confirmation message when it's done.

Here's the thing—this only removes the main program. OneNote leaves behind support files, so we need to dig deeper. Don't skip the next steps or you'll end up with orphaned components.

Open File Explorer and navigate to C:\Program Files. Delete the Microsoft Office folder if it exists—this contains shared components that might still reference OneNote. Be careful here: only delete the Microsoft Office folder, not the entire Program Files directory.

Next, check C:\Program Files (x86) for any leftover OneNote folders. Look for anything named OneNote, Microsoft OneNote, or Office16. Delete these folders if they appear. Empty your Recycle Bin afterward to permanently remove them.

I always check C:\Users\[YourUsername]\AppData\Local\Microsoft\Office too. Delete any OneNote or 16.0 folders you find there. If you can't see the AppData folder, enable hidden files in File Explorer by clicking the View tab and checking Hidden items.

Warning: Editing the registry can damage your system. Backup your registry first by opening Regedit (press Win + R, type regedit, and hit Enter), then go to File > Export and save a backup.

In the registry editor, navigate to HKEY_CURRENT_USER\Software\Microsoft\Office. Look for any keys containing OneNote or 16.0 and delete them. Next, go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office and repeat the process, deleting any OneNote-related keys.

Finally, check HKEY_CLASSES_ROOT\Applications\ONENOTE.EXE and delete the entire key if it exists. Close the registry editor when done. This ensures no shortcuts or associations remain tied to OneNote.

Restart your computer to ensure all changes take effect. After reboot, press Win + R, type OneNote, and hit Enter. If OneNote doesn't launch and you see an error like "This app can't open," the uninstall was successful.

Open Task Manager (press Ctrl + Shift + Esc) and check the Startup tab. Remove any OneNote entries you find there. Also, check Apps and Features again to confirm OneNote no longer appears in the list.

For extra peace of mind, run a system file check by opening Command Prompt as Administrator and typing sfc /scannow. This repairs any corrupted system files that might have been left behind. The scan takes about 10-15 minutes—let it complete fully.

Tips & tricks for completely removing OneNote from Windows 10

Took me years of helping users clean up their systems—here are the tricks that ensure OneNote is truly gone and your PC runs smoother afterward.

Backup First: Before making any changes, create a system restore point (search for "Create a restore point" in the Start menu). This is your safety net if something goes wrong during the registry cleanup. I've seen registry edits go sideways, and having this backup saved me from multiple headaches. Trust me on this.

Hidden Files Are the Real Culprits: In Step 2, when you're checking C:\Users\[YourUsername]\AppData\Local\Microsoft\Office, don't stop at the obvious folders. Look for any files with names like "OneNote.exe" or "Office16" hidden in subfolders. I once helped a user who missed a hidden "OneNoteTemp" folder that kept recreating shortcuts. Enable "Hidden items" in File Explorer and take that extra 30 seconds to scan thoroughly.

Registry Cleanup Pro Tip: When you're in Regedit during Step 3, don't just delete keys containing "OneNote"—look for any keys with "16.0" in the path. This version number often gets missed, and it's how Office components reference each other. I've seen systems where OneNote kept reappearing because these version-specific keys weren't removed. Be thorough here, but remember: always export first!

Post-Removal Verification: After completing all steps, open Command Prompt as Administrator and type "tasklist | findstr onenote". If you see any processes listed, OneNote is still running somewhere. This command catches hidden processes that might not show up in Task Manager. I've caught lingering OneNote processes this way more times than I can count.

Frequently asked questions

Got questions about uninstalling OneNote for Windows 10? You’re not alone! Here are some of the most common concerns—and their answers—to make your cleanup process smooth as butter.

Wrapping up and next steps

Uninstalling OneNote from Windows 10 doesn’t have to be a hassle—you’ve got this! 🎉 Whether you’re freeing up space, troubleshooting, or simply switching tools, following the steps above ensures a clean removal.

Remember, double-checking with Settings or Control Panel and using third-party tools like Revo Uninstaller can save you from leftover files.

Now that your system is OneNote-free, take a moment to explore other apps or tweak your Windows 10 setup. Need help optimizing your PC further? Check out our guides on speeding up Windows 10 or managing startup programs! 🚀