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Why do I get the error message 537 during the update?

Based on the customer support feedback, this article provides solutions to the most common causes of error during Avira product updates.

  1. Open the "Avira Control Center" via the Avira icon in the taskbar and click Start update
  2. A window with an error message may appear


  3. Click Report to open the update report of the error message. You can see the error message at the end of the report, above the summary. If there is a problem regarding the Internet connection of the Avira product update program, you will see the following or a similar error message:

16:15:24 [UPD] [ERROR] Generation of update structure failed. UpdateLib delivers error 537.

Probably the Windows system settings could not be detected
  1. Open the "Avira Control Center" via the Avira icon in the taskbar
  2. Go to Extras → Configuration
  3. Click PC Protection → Web server → Proxy settings
  4. Click the option No proxy server if you do not use a proxy
  5. Click OK to apply the configuration

A security software with firewall is blocking the Avira update process update.exe

Check if you have another security software with a firewall installed on your computer. Open the Windows Start menu, to see the list of the installed software.
If you can identify the security software with the firewall, you can generally see and modify the list of allowed and blocked applications in the firewall's settings. Make sure that none of Avira's program files are blocked, including sched.exe and update.exe

Check the Network settings in Avira Control Center
  1. Open the "Avira Control Center" via the Avira icon in the taskbar
  2. Go to Extras → Configuration
  3. Click the "+" sign next to Update
  4. Click Web server
  5. Select the option Use existing connection (network), if the connection to the Internet is not automatic. Else, select the second option Use the following connection and select from the list the dial-up connection you use.
  6. Click OK to apply the settings.

Do you use a proxy for the Internet access or a security software, which installed a local proxy?

Usually, most of the Internet surfers do not need to configure a proxy, to connect their computers to the Internet. If the computer is in a company network or if a security software installed a local proxy on it, to filter Internet data, then you also have to make these settings in the Avira software, to run Avira product updates.

To check if there is a proxy set on your computer:

  1. Go to Start → (Settings) → Control Panel → Internet options
  2. Click the Connections tab
  3. Under Local Area Network (LAN) settings click the LAN settings button
  4. Check if the option Use a proxy server for your LAN... is active
  5. Write down the proxy address and port
  6. Close the configuration windows with OK

Then open the configuration of Avira Control Center and similar to case A, insert the data you wrote down. Type the Address and Port of the proxy server for the option Use the following proxy server. Leave the other fields empty.

Avira product update is not run with proper access rights

This is a workaround, for placing a shortcut to Avira product update on the Desktop, which will then run with different access rights.

  1. Right-click anywhere on the Desktop
  2. Select New → Shortcut from the context menu
  3. Copy one of the following lines as location:

    • For Windows XP:
      "C:\Program Files\Avira\AntiVirus\update.exe" /DM="0" /NOMESSAGEBOX /RECEIVETIMEOUT=120

    • For Windows 7/8/8.1/10 (32-bit):
      "C:\Program Files\Avira\AntiVirus\update.exe" /DM="0" /NOMESSAGEBOX /RECEIVETIMEOUT=120

    • For Windows 7/8/8.1/10 (64-bit):
      "C:\Program Files (x86)\Avira\AntiVirus\update.exe" /DM="0" /NOMESSAGEBOX /RECEIVETIMEOUT=120

  4. Click Next
  5. Give a name to the shortcut, for example Avira product update
  6. Click Finish

Then click the new shortcut and check if Avira product update runs successfully. For the next automatic update, make sure the error 537 does not occur anymore.

Avira product update continues to report error 537

In case none of the above solutions helped fixing the error, a manual update is recommended, as described in the following article: How to carry out manual update (IVDF Fusebundle)?

  • Affected products
  • Avira Free Antivirus
  • Avira Antivirus Pro
  • Avira Internet Security Suite
  • Avira Family Protection Suite
  • Avira Ultimate Protection Suite


Manual update of the Avira virus definition files
If you do not have Internet access to update your Antivirus, take the advantage and perform a manual update of your Avira virus definition files via the Avira Fusebundle Generator.

The following instruction applies only to Avira products starting with version 2012.
It is also highly recommended to perform an Avira product upgrade to the latest Antivirus version.

Update process of the virus definition files (VDF)
Created the VDF Fusebundle archive

Use a computer with Internet access to download the current Avira Fusebundle Generator
Extract the downloaded file:
Open the extracted folder and double-click the file: fusebundle.exe
The Fusebundle archive ( is created. The creation of the archive may last up to a few minutes
Open the folder install and copy the new created file onto a data carrier (USB memory, CD-ROM, etc.). It is not necessary to extract the ZIP file

Updating the Antivirus
Connect the data carrier to the computer without internet access
Open the "Avira Control Center" via the Avira icon in the taskbar
Click in the menu bar Update → Manual update, select the file from the connected data carrier and click Open
Avira Antivirus updates automatically the latest virus definitions


Version 2013
The Fusebundle archive was generated for the Avira version 2013 and requires no further change.

Version 2012
When using the Fusebundles for an Avira version 2012 on a 32-bit or 64-bit operating system, enter the parameter platform=win32 in the “fusebundle.conf“.

sitenin türlçe iletişimini bulamadım avira benim kabusum oldu sanırım bir vürüs avira gibi davranıyor ve pc mi işgal etmiş durumda avirayı ne günçelleye biliyorum nede pc taraması yapamıyorum avirayı pc den kaldırıyorum fakat kaldırdıgım halde bir çok avira uygulaması yinede çalışıyor ve pc yi olagan üstü şekilde yavaşlatıyor tetrar kurup kaldırmayı denedim yine olmadı ve tekrar kurdugumda günçellemede yapamıyor ve pc yi taramayıda gerçekleştiremiyor ekran görüntüsünü bu adresten bakabilirsiniz

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