That's too bad. :-(
It's a bit drastic, but not as bad as it might sound, you could try
the Reset button at Internet Options, Advanced tab. This will disable
all browser add-ons and reset all browser settings to their original
state, as it was when first installed (of course it keeps all security
updates and such). Perhaps, this will help.
Other possible causes are a slow or unstable Internet connection,
network problems, trouble with your cable or DSL modem, Web site
problems, trouble with your Internet Service Provider and DNS at their
site. You could try resetting your cable/DSL modem and network router
(if you have a router). Maybe some other things.
A good place to check your Internet connection speed is
http://www.speakeasy.net/speedtest/
I'm not sure that I can be much more help troubleshooting remotely,
but let me know if you try any of these.
-solon fox