This article is about repairing Avast One. For information about repairing Avast Free Antivirus and Avast Premium Security, refer to the following article: Repairing Avast Antivirus.
If certain application components and features are not working properly in Avast One, we recommend you repair your installation using the Avast Setup window. Installation repair is recommended to resolve the following issues with your Avast application:
- Certain features are not working.
- A scan is stuck mid-progress.
- An application update fails.
When you repair Avast One, some customized settings may return to their default configurations.
Instructions
- Ensure that no other applications are running on your PC.
- Right-click the Windows
Start icon and select Apps and Features from the menu that appears. - Beside Avast One, click
⋮Options (the three dots) and select Uninstall twice. - If prompted for permission by the User Account Control dialog, click Yes.
- When the Avast Setup window appears, click Repair.
- Wait while setup repairs your Avast application.
- If prompted, click Restart computer to immediately reboot your PC and complete the repair. If a restart is not necessary, click Done.
Start icon and select Apps and Features from the menu that appears. 
- Ensure that no other applications are running on your PC.
- Right-click the Windows Start icon and select Apps and Features from the menu that appears.
- Click Avast One, and select Uninstall twice.
- If prompted for permission by the User Account Control dialog, click Yes.
- When the Avast Setup window appears, click Repair.
- Wait while setup repairs your Avast application.
- If prompted, click Restart computer to immediately reboot your PC and complete the repair. If a restart is not necessary, click Done.
Start icon and select Apps and Features from the menu that appears. 
- Ensure that no other applications are running on your PC.
- On your keyboard, press the Windows logo key.
- Select Programs and Features from the menu that appears.
- Right-click Avast One, and select Uninstall.
- If prompted for permission by the User Account Control dialog, click Yes.
- When the Avast Setup window appears, click Repair.
- Wait while setup repairs your Avast application.
- If prompted, click Restart computer to immediately reboot your PC and complete the repair. If a restart is not necessary, click Done.
logo key. 
- Ensure that no other applications are running on your PC.
- Click the Windows Start icon and select Control Panel.
- Follow option A or option B below according to your view:
- Option A (Default category view): Under Programs, click Uninstall a program.
- Option B (Large/small icons view): Click Programs and Features.
- Option A (Default category view): Under Programs, click Uninstall a program.
- Right-click Avast One, and select Uninstall.
- If prompted for permission by the User Account Control dialog, click Yes.
- When the Avast Setup window appears, click Repair.
- Wait while setup repairs your Avast application.
- If prompted, click Restart computer to immediately reboot your PC and complete the repair. If a restart is not necessary, click Done.
Start icon and select Control Panel. 
Your Avast application is repaired.
- Ensure that no other applications are running on your PC.
- Right-click the Windows Start icon and select Apps and Features from the menu that appears.
- Beside Avast One, click
⋮Options (the three dots) and select Uninstall twice. - If prompted for permission by the User Account Control dialog, click Yes.
- When the Avast Setup window appears, click Repair.
- Select Yes, to confirm that you have intentionally requested to repair the application.
- Wait while setup repairs your Avast application.
- If prompted, click Restart computer to immediately reboot your PC and complete the repair. If a restart is not necessary, click Done.
- Ensure that no other applications are running on your PC.
- Right-click the Windows Start icon and select Apps and Features from the menu that appears.
- Click Avast One, and select Uninstall twice.
- If prompted for permission by the User Account Control dialog, click Yes.
- When the Avast Setup window appears, click Repair.
- Select Yes, to confirm that you have intentionally requested to repair the application.
- Wait while setup repairs your Avast application.
- If prompted, click Restart computer to immediately reboot your PC and complete the repair. If a restart is not necessary, click Done.
- Ensure that no other applications are running on your PC.
- On your keyboard, press the Windows logo key.
- Select Programs and Features from the menu that appears.
- Right-click Avast One, and select Uninstall.
- If prompted for permission by the User Account Control dialog, click Yes.
- When the Avast Setup window appears, click Repair.
- Select Yes, to confirm that you have intentionally requested to repair the application.
- Wait while setup repairs your Avast application.
- If prompted, click Restart computer to immediately reboot your PC and complete the repair. If a restart is not necessary, click Done.
- Ensure that no other applications are running on your PC.
- Click the Windows Start icon and select Control Panel.
- Follow option A or option B below according to your view:
- Option A (Default category view): Under Programs, click Uninstall a program.
- Option B (Large/small icons view): Click Programs and Features.
- Option A (Default category view): Under Programs, click Uninstall a program.
- Right-click Avast One, and select Uninstall.
- If prompted for permission by the User Account Control dialog, click Yes.
- When the Avast Setup window appears, click Repair.
- Select Yes, to confirm that you have intentionally requested to repair the application.
- Wait while setup repairs your Avast application.
- If prompted, click Restart computer to immediately reboot your PC and complete the repair. If a restart is not necessary, click Done.
Your Avast application is repaired.
- Avast One
- Windows
Updated on: 18/09/2025
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