Hello,
We have the same problem here, and yes, also located in Thailand, using the local TRUE ADSL service.
These are the last two lines in the log (the lost line we also get after clicking the red popup indicating an update did not work.
08.09.2008 15:42:37 package: ERROR MakeVps LoadFullPackage: C:\Program Files\Alwil Software\Avast4\Setup\vps-8090200.vpu, error 0x00000002
08.09.2008 15:42:37 general: Err:Other HTTP error (404), while trying 75.125.223.162:80//iavs4x/vps-8090200.vp
Are you saying this has something to do with an ISP provider. Would it somehow help to remove AVAST and reinstall the latest version?
Best greetings.
Guido, Bangkok (Thailand)