this may mean the only thing - the file setiface.dll from directory avast4\setup is missing. Is that true?
If so, please zip first files setup.log and setup.ini and send it to us. Then copy file setiXXXXXXXX.vpu to setiface.dll. (XXXXXXXX is a hexadecimal number, simply use such file with highest date).
Hate to jump into a thread, but I’m having a similar problem. I’m running Avast 4 Home edition build June 2003-2 4.0.235 which is the latest version with virus defintion version 0306-6. I see that there is an updated virus definition avaiable on your website, 0307-0. I’m running Avast on my Win98 SE with an AMD K6
When I try to update the virus definitions, I get the error message “One of the Library Files needed to run this application cannot be found. Cannot start incrimental update.”
I’ve followed your advice and found the seti000000eb.vpu file in my window’s temp and have copied it to Avast4/setup folder and re-named it setiface.dll.
Now when I try to update the virus definition I get the error message “The system cannot find the file specified. Cannot start incrimental update.”