Home edition - can't download virus database or program updates - error code 501

[woodbutcher]

Error message returns "Error:  HTTP server returned error 501"
Windows firewal set for default settings
HTTP proxy settings are:
Use HTTP 1.1 - checked
Use HTTP 1.1 through proxy connections - checked
Internet Explorer is working, with good connection, and able to pull up internet sites, like:  http//www.comcast.net/
Firewall settings on that computer are same as on this one, which I run Avast Pro on. Running Avast Home on troubled computer

[onlysomeone]

Hi woodbutcher!

Do you use any other security software on that computer? (antivirus, antispyware, firewall,...)
Did you use other security software on that computer before?
If yes, which one and how did you remove it?
Which operating system is used on that computer?

I suggest you run a scan with Malwarebytes Antimalware and see if it finds anything...

yours
onlysomeone

[Lisandro]

Please check if the file C:\Program Files\Alwil Software\Avast4\Setup\servers.def is displayed correctly, it should contain [servers] on the first line.

You can try and download the servers.def file, http://files.avast.com/iavs4x/servers.def and replace the one in the avast setup folder, disabling the avast self-defense module first.

How do you connect to internet, is it ADSL? And do you have other computers with working avast updates using the same connection?

Try to open avast settings - Update (Connections), press Proxy button, and select Direct connection, press OK to confirm. Then try to start iAVS update manually again.