How to Uninstall Comodo Antivirus on Windows

This guide walks you through completely removing Comodo Antivirus from a Windows PC, including the built-in uninstaller, leftover files, and registry entries. You will need administrator access to the computer and, ideally, a backup of any important files before starting.

What You’ll Need

Administrator account on the Windows PC
Internet connection (for downloading the official removal tool if needed)
Your Windows product key or Microsoft account (only if you need to reinstall Windows after a failed removal – rare)

Step-by-Step

Close all Comodo-related programs. Look in the system tray (bottom-right corner near the clock) for the Comodo shield icon. Right-click it and select Exit or Disable if available. Also close any open Comodo windows (e.g., the main dashboard or firewall alerts).
Open Windows Settings. Press Windows key + I to open Settings. Alternatively, click the Start button and then the gear icon.
Go to Apps. In Settings, click Apps (or Apps & features on older Windows versions).
Find Comodo Antivirus. Scroll through the list or use the search box at the top to type “Comodo�. You should see entries like “Comodo Antivirus� or “Comodo Internet Security�.
Start the uninstall. Click on the Comodo entry, then click Uninstall. If a confirmation prompt appears, click Yes or Uninstall again.
Follow the Comodo uninstaller prompts. The Comodo removal wizard will open. Click Next or Continue as prompted. You may be asked whether you want to remove all user data and settings – choose Yes to remove everything. If asked to reboot, you can choose to do it later, but it is safer to restart now to finish the removal.
Reboot your computer. After the wizard finishes, restart Windows. This clears any locked files that were in use during the uninstall.
Check for leftover files. After reboot, open File Explorer and navigate to C:\Program Files\Comodo and C:\Program Files (x86)\Comodo. If these folders still exist, delete them. Also check C:\ProgramData\Comodo (you may need to enable “Hidden items� under the View tab in File Explorer).
Clean the registry (optional but recommended). Press Windows key + R, type regedit, and press Enter. Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Comodo and HKEY_CURRENT_USER\SOFTWARE\Comodo. Right-click each and select Delete if they exist. Also search for “Comodo� using Ctrl + F and delete any remaining keys. Be careful – only delete keys you are sure belong to Comodo.
Run the official Comodo removal tool (if problems persist). If the uninstaller fails or leaves errors, download the “Comodo Uninstaller� or “Comodo Cleaning Essentials� tool from the official Comodo website. Run it as administrator and follow its instructions. This tool is designed to remove all traces of Comodo products.
Restart again. After using the removal tool or cleaning the registry, restart your computer one more time.

Common Mistakes

Skipping the reboot before deleting folders. If you try to delete Comodo folders while the antivirus is still running in the background, Windows will block the deletion. Always reboot after the main uninstaller finishes.
Ignoring the system tray icon. If you don’t exit Comodo from the tray, the uninstaller may not run properly because the antivirus is protecting its own files.
Deleting registry keys blindly. Removing unrelated entries that happen to contain “Comodo� (like a browser extension) can break other software. Only delete keys under the Comodo folders or clearly named Comodo entries.
Not using the official removal tool when needed. Trying to manually delete every file and registry entry when the uninstaller fails often leaves more damage than just running the dedicated tool.
Installing another antivirus before fully removing Comodo. Two active antivirus programs will conflict and cause system slowdowns or crashes. Install a new one only after Comodo is completely gone.

Tips

Before uninstalling, ensure you have another antivirus solution ready (like Windows Defender, which is built-in). Do not leave your PC unprotected for long.
If you have a Comodo account or license key, note it down – you may need it if you ever reinstall.
Use the “Programs and Features� control panel (old-style) if Settings is not working. Press Windows key + R, type appwiz.cpl, and press Enter.
After removal, run a disk cleanup (search “Disk Cleanup� in Start) to remove temporary files that may be left over.
If you are unsure about registry editing, skip that step – the official removal tool does it for you.

Troubleshooting

Uninstaller does not start or freezes. Try running the uninstaller in Safe Mode. Restart your PC, press F8 (or Shift + Restart) and choose Safe Mode, then repeat the uninstall steps. Safe Mode prevents Comodo from loading its protection drivers.

“Access denied� errors during uninstall. This usually means you are not running as administrator. Right-click the uninstaller or Settings and choose “Run as administrator�. If that fails, use the official Comodo removal tool.

Comodo services still appear in Task Manager. Open Task Manager (Ctrl + Shift + Esc), go to the Services tab, find any service with “Comodo� in the name, right-click and stop it. Then try the uninstall again.

Windows won’t boot after removal. This is rare but can happen if the firewall driver was removed incorrectly. Boot into Safe Mode, open Device Manager, and uninstall any “Comodo� network adapters or filters. If that doesn’t work, use System Restore to roll back to a point before the uninstall.

Leftover notifications or pop-ups. If you still see Comodo pop-ups, the background service is still running. Open Task Manager, end any Comodo processes, then delete the remaining folders and registry keys as described above.

Cannot install a new antivirus. Some antivirus installers detect leftover Comodo files and refuse to install. Run the Comodo removal tool again, then restart. If it still fails, use a generic “antivirus removal tool� from the new antivirus vendor (most offer one).

Frequently Asked Questions

Q: Do I need to uninstall Comodo before installing another antivirus?
A: Yes. Running two antivirus programs simultaneously causes conflicts, performance issues, and false alerts. Always remove the old one first.

Q: Is Windows Defender enough after removing Comodo?
A: Yes. Windows Defender (now called Microsoft Defender) is a full antivirus and is enabled by default when no other antivirus is installed. It is adequate for most users.

Q: Will uninstalling Comodo delete my firewall settings?
A: Yes, Comodo’s firewall settings will be removed. Windows Firewall will take over automatically. You may need to re-add any custom port rules you had.

Q: Can I just disable Comodo instead of uninstalling it?
A: Yes, you can disable real-time protection temporarily, but it will still run in the background and may re-enable itself. Uninstalling is the only way to fully remove it.

Q: What if the uninstaller asks for a product key?
A: This is rare. If it does, look in your email for the purchase receipt or check the Comodo account portal. If you don’t have it, you can still proceed with the removal tool.

Q: How long does the whole process take?
A: Typically 10–20 minutes, including two reboots. If you need to use the official removal tool, add another 5–10 minutes.

General steps for current mainstream versions; menus can differ by device and version. See the disclaimer or report an error.

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