It’s no use to upgrade this computer to W98 because it seems to be hard enough to run Win95 on it. And I’ve understand that Avast! runs on older platforms too. I don’t think that the problem is in Outlook Express or msoe.dll because it ran properly before installing Avast! Antivirus. But if it is so hard to make this software run on my computer, I can also buy some other anti-virus tool for it…
And no, I haven’t applied any upgrades that would affect on Outlook Express.