Promotional banner image

IS YOUR COMPUTER SLOW? RUN LIKE NEW

If they are not maintained, computers lose performance over time. Avast Cleanup Premium can help significantly improve the performance of your computer.

Repairing Avast One

Windows

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

There are now two different versions of Avast One, so make sure to follow the steps that correspond to your version.

Your Avast One app:

Windows 11
  1. Ensure that no other applications are running on your PC.
  2. Right-click the Windows Start icon and select Apps and Features from the menu that appears.
  3. Beside Avast One, click ⋮ Options (the three dots) and select Uninstall twice.
  4. If prompted for permission by the User Account Control dialog, click Yes.
  5. When the Avast Setup window appears, click Repair.
  6. Wait while setup repairs your Avast application.
  7. If prompted, click Restart computer to immediately reboot your PC and complete the repair. If a restart is not necessary, click Done.

Windows 10
  1. Ensure that no other applications are running on your PC.
  2. Right-click the Windows Start icon and select Apps and Features from the menu that appears.
  3. Click Avast One, and select Uninstall twice.
  4. If prompted for permission by the User Account Control dialog, click Yes.
  5. When the Avast Setup window appears, click Repair.
  6. Wait while setup repairs your Avast application.
  7. If prompted, click Restart computer to immediately reboot your PC and complete the repair. If a restart is not necessary, click Done.

Windows 8
  1. Ensure that no other applications are running on your PC.
  2. On your keyboard, press the Windows logo key.
  3. Select Programs and Features from the menu that appears.
  4. Right-click Avast One, and select Uninstall.
  5. If prompted for permission by the User Account Control dialog, click Yes.
  6. When the Avast Setup window appears, click Repair.
  7. Wait while setup repairs your Avast application.
  8. If prompted, click Restart computer to immediately reboot your PC and complete the repair. If a restart is not necessary, click Done.

Windows 7
  1. Ensure that no other applications are running on your PC.
  2. Click the Windows Start icon and select Control Panel.
  3. 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.
  4. Right-click Avast One, and select Uninstall.
  5. If prompted for permission by the User Account Control dialog, click Yes.
  6. When the Avast Setup window appears, click Repair.
  7. Wait while setup repairs your Avast application.
  8. 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.

Windows 11
  1. Ensure that no other applications are running on your PC.
  2. Right-click the Windows Start icon and select Apps and Features from the menu that appears.
  3. Beside Avast One, click ⋮ Options (the three dots) and select Uninstall twice.
  4. If prompted for permission by the User Account Control dialog, click Yes.
  5. When the Avast Setup window appears, click Repair.
  6. Select Yes, to confirm that you have intentionally requested to repair the application.
  7. Wait while setup repairs your Avast application.
  8. If prompted, click Restart computer to immediately reboot your PC and complete the repair. If a restart is not necessary, click Done.

Windows 10
  1. Ensure that no other applications are running on your PC.
  2. Right-click the Windows Start icon and select Apps and Features from the menu that appears.
  3. Click Avast One, and select Uninstall twice.
  4. If prompted for permission by the User Account Control dialog, click Yes.
  5. When the Avast Setup window appears, click Repair.
  6. Select Yes, to confirm that you have intentionally requested to repair the application.
  7. Wait while setup repairs your Avast application.
  8. If prompted, click Restart computer to immediately reboot your PC and complete the repair. If a restart is not necessary, click Done.

Windows 8
  1. Ensure that no other applications are running on your PC.
  2. On your keyboard, press the Windows logo key.
  3. Select Programs and Features from the menu that appears.
  4. Right-click Avast One, and select Uninstall.
  5. If prompted for permission by the User Account Control dialog, click Yes.
  6. When the Avast Setup window appears, click Repair.
  7. Select Yes, to confirm that you have intentionally requested to repair the application.
  8. Wait while setup repairs your Avast application.
  9. If prompted, click Restart computer to immediately reboot your PC and complete the repair. If a restart is not necessary, click Done.

Windows 7
  1. Ensure that no other applications are running on your PC.
  2. Click the Windows Start icon and select Control Panel.
  3. 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.
  4. Right-click Avast One, and select Uninstall.
  5. If prompted for permission by the User Account Control dialog, click Yes.
  6. When the Avast Setup window appears, click Repair.
  7. Select Yes, to confirm that you have intentionally requested to repair the application.
  8. Wait while setup repairs your Avast application.
  9. 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.

DocID: repairing-avast-oneLast modified: 09/03/2026

Was this article helpful?

Promotional banner image

Keep your online identity private!

Browse like no one’s watching with Avast anti-tracking software.

Need more help?

Contact us
Avast account
Visit our forums
Visit academy