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How do I perform a manual reinstallation of my Avira Antivirus product?

The described procedure should only be applied if a conventional Avira uninstallation via “Control Panel → Programs and Features/Uninstall a program” fails.

To perform successfully a manual reinstallation of your Avira Antivirus you have to perform first a cleanup of your current Avira Antivirus.

I. Clean your system

1. Delete residual Avira files

  1. Boot your Windows System in Safe Mode.

  2. Make sure that your folder options are set as follows.
    Click: Start → Control Panel → Folder Options → View → Show Hidden Files and Folders → OK

  3. Delete the following folders if they exist:
    • C:\Program Files\Avira
    • C:\ProgramData\Avira
    • C:\Documents and Settings\All Users\Application Data\Avira
    Hint: There is no action required if these folders do not exist.

  4. Boot your Windows System in Normal Mode.

2. Clean your registry

  1. Download Avira RegistryCleaner.
  2. Run the downloaded file.
  3. Click Read Keys and confirm with OK after the scan.
  4. If any keys are found, enable the control box "select all", and click Delete.
  5. Confirm the next prompt with OK.

3. Reset the Windows LSP (Winsock)

This step is only required if your computer is running a Windows 7 operating system.

Windows 7
  1. Click Start → All Programs → Accessories.
  2. Right click "Command Prompt" and run it as administrator.
  3. Type the following command in the command line:
    netsh winsock reset
  4. Press Enter.
  5. Restart your computer.

II. Reinstall your Antivirus
  1. Log in to Avira Connect
  2. Click in the left menu panel the Subscriptions button.
  3. Search for “Antivirus” and click Install.
  4. The previously acquired Avira Antivirus package will be reinstalled, and the license will be activated automatically.

  • Affected products
  • Avira Free Antivirus
  • Avira Antivirus Pro
  • Avira Prime (unlimited devices)
  • Avira Optimization Suite
  • Avira Internet Security
  • Avira Total Security Suite
  • Avira Internet Security Suite


I just recently paid $29.95 for Avira System Speedup, and it will not do anything after it has scanned all files in registry and other areas of my PC. Everytime I try to run a Cleanup Scan, it says that I have to purchase in order to continue. I downloaded this product off the net. And I have typed in my activation code and it still says that I have to buy. This is urgent as I have Avira Anti Virus to and my PC has an HEUR Trojan File in it. I do not want it quarantined as I want that file removed out of my system immediately. Could someone please help me here? I am NOT going to keep buying your products off your website when I have already paid for your product.

Jerry Schaaf

Further to the post concerning my installation problem, AVIRA did today reply with detailed instructions for installation on my Windows XP computer as follows:

- Download the file of your Avira product


- Double-click to download the file and follow the prompts by clicking "accept", "agree", "continue", etc.
- Enter your activation code in the license assistant
Your Activation code: (enter your code)
- Click on "Next"
- Please use your email address <address> when registering your product, enter the required data and click on "Next"
- You have successfully installed and activated your product!

Hope this helps.
David Allan

Ich habe mich schon dreimal hier gemeldet, aber es passiert nichts! Ich habe auf Pro updated. Ich musste Windows (7 Pro, 64 bit) neu aufsetzen und habe meine Mailadresse geändert. Die Lizenz läuft bis 29.11.17 und ist hier in meinem Konto auch verzeichnet. Aber ich kann das Free Antivirus auch über das Lizenzmanagement nicht upgraden, auch de- und reinstallieren hat einen Dreck geholfen.

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