First thing, thanks to all responders! You confirmed my fears, that Avast is dropping support for Windows 98. IIUC you also are saying Avast 4 will continue to work, even if unsupported, or is it only for some time ? I would hope virus def updates stay compatible even if the new program has got more functions.
Further question and a very big one, why does the program advertise upgrade and seems to do the download, shouldn't it be aware the update won't succeed on this system! Grrr... how much time I've spent before coming to ask to this forum ! In the future, how can I suppress the splash screen that almost forces me to (try to) upgrade ?
Also, since the program spent a long time downloading that impossible upgrade, and then failed to instal (without even pooping up an explanation or reporting cause in to the log)- I also suspect it might have left useless downloaded files somewhere, if so what is (are) the names of (maybe partial) downloads and where should I look for them in order to remove ? Problem is, I have a dozen partitions on 4 different hard drives here, it is not easy for me to locate unknown junk that I don't have a clue where it might reside and how named !
Thank you anyway. I've loved Avast since I first installed, it's a pity we may have to part.