After some time (several days), my Win98SE stops responding to mouse clicks. But what's funny, it still does some things with the mouse:
- the mouse moves are okay, just clicking doesn't work
- clicking outside a window will remove the focus from that window
- if I activate Start (Ctrl-Esc), all mouse operations work! (but only for the Taskbar)
It might be caused by the anti-virus software Avira, it seems to need a reboot after having been updated. But, AFAIK, the update doesn't run automatically, so it shouldn't cause these problems.