I use IE 6 and firefox 1.5.0.7. I have the problem of IE unexpectedly closing error when I browse the pages of the forum. It happens randomly and it will happen when the page only loads upper portion of the forum. This is quite similar to the problem recently where the page don't load most of the time. But now, it continue to load but after a while, it will shut itself down unexpectedly. This happens in the computers of my school and at home. The computers in the my school automatically restores the HDD to the checkpoint where the admin made each time a user logs out. So, there is negligible chance that the computer is infected with bugs.
For firefox, it will show an error of irresponsive script and it asks whether to terminate the script.

But I am using IE 6 when the problem arise. I couldn't see anything weird when I tried to make the error occur again. And it's just being random.