How to clean uninstall and re-install Avast Business

Clean Uninstall Avast

To completely uninstall Avast and remove any leftover remnants…

  1. Open Control Panel
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  2. Click on either Programs and Features or Uninstall a program
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  3. Select Avast product in the list of installed programs
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  4. Click on Uninstall button
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  5. Restart computer (preferably in Safe Mode with Networking) after uninstall has completed
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  6. Download/save/run Avast Clear Uninstall Utility by using this link http://files.avast.com/iavs9x/avastclear.exe
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  7. Restart computer again after the Avast Clear Uninstall Utility has completed
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  8. Delete any Avast folders in these locations:
  • C:\Program Files
  • C:\Program Files (x86)
  • C:\ProgramData
  1. Please skip the steps below for all Microsoft Server operating systems!
  1. Please restart computer again

(Re)Install Avast

(Re)installing Avast depends upon what business product you are using…

  1. Please verify no other antivirus security software is currently installed in Control Panel > Programs and Features or Uninstall a program, and may include (but not limited to):
  • AVG
  • Avira
  • Bitdefender
  • ESET
  • F-Secure
  • Kaspersky
  • McAfee
  • Norton
  • Panda
  • Symantec
  • Trend Micro
  • Webroot
  1. Download/save/run latest Avast full installer…
      • For Previous versions of business products click on Show more…

  1. If applicable, please have your Avast activation code/license file ready when you install, or activate the device in the Avast Console

  2. Please restart computer again at earliest convenience

For installation and user guides related to your Avast product, please see https://www.avast.com/download-documentation

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