No, not all of the fonts are corrupt. In the case of text what I mean by corrupt is - so small it cannot be read. The labels for the icons on the desktop are all affected. In Outlook Express: File, Edit, View Tools, Message, Help are unaffected, but text in the lower panels such as the folder list are affected. Text in the preview panel is affected, but the actual text of messages when opened in the preview panel is not affected. In Internet explorer the text underneath buttons is affected. In the address bar the word address is not affected but the URL within the address bar is affected. In Windows Explorer the names of files and folders are affected as is the address within the address bar. Non microsoft applications succh as Firefox seem largely unaffected except for the Minimize Maximize, Close buttons which are now squiggles in all applications. On the start menu, and drop down menus of microsoft applications, the arrow denoting subsidiary folders is now a blob. This is not true of Firefox where the arrows on drop down menus are still arrows. Any boxes that have to be ticked eg save password and connect automatically on the dial up connection are now illegible mush. This seems to be true of all such boxes. As for what I was doing. Well I am not certain, but it might have been an attempt to update a DIVX player that I had installed using the update function. When I did so I received a warning to the effect that the update had stopped in order to prevent damage because the new version was not suitable for Windows 98. I say I am not certain because the computer booted up once without problems after this but on the second occasion the problem occured and has been entirely consistent since.