Avast update not uploading in Windows 10

Avast keeps asking me to update, but the update doesn’t download, and I’m given an ‘unknown error’.
Does anybody know how to fix this?

  1. Download Avast Free Antivirus: https://files.avast.com/iavs9x/avast_free_antivirus_setup_offline.exe
  2. Follow instructions: https://www.avast.com/uninstall-utility (Run this tool for all prior installed Avast versions…!!)
  3. Reinstall Avast with the downloaded installer from point 1.
  4. Reboot.