Hello I am trying to to get a older version for a older computer the one that I need is
18.8.2356 (build 18.184084.409)
I found this link https://forum.avast.com/index.php?topic=223244.0
but it was not the right one I need to get the offline installer…
Try this Link - https://www.filepuma.com/download/avast_free_antivirus-2/versions/2 - scroll down to 18.8.2356, I don’t know exactly what the build number will be.
that is the free version I need the internet security version
There is a forum section relating to WinXP/Vista and in there Bob3160 some time back posted this: https://forum.avast.com/index.php?topic=220639.msg1533473#msg1533473
I’m not clairvoyant, so went for the more frequent requests.
My fault I thought I had said the internet version appreciate any help in finding ii…
I think I may have found it but I will have to test it tomorrow to be certain its late now
https://www.softerm.net/mirror/10291-download-fileauthor.html
sigh not it got a not a valid win32 file…
Did you not try the forum link given by rocksteady, posted by ‘bob3160’ and that has direct download links at Avast for different Avast Programs ?
Whilst this was done for the End of Support for WinXP, the programs if available should still work for later windows versions, though you didn’t say what OS version you are using.
I just checked and the off-line installation file for Avast Internet Security is still available, see attached image. I just started it of to get the screenshot and then stopped it.
I think I did and it was the wrong version or something I will try it again…
That was/is the last supported version for WinXP/Vista - I still don’t know what your OS is and if this version would be supported ?
I downloaded the complete file 296MB - this is exact version 18.8.4084.0 and the last one for WinXP/Vista as has been mentioned.
It is slightly later than that you are seeking, but not knowing why you need that version or what OS you are using I’m working in the dark.
The different between what you seek 18.8.2356 and what is available 18.8.4084.0 is a minor update (both are for the same year and month 18.8), most likely an update for final version.
Yep that was it and is now working thanks for all who helped appreciate it
this computer is running xppro
It’s amazing how many downloads have happened via that link. 
You’re welcome.