[Syncro]

Try tools (at top of window)

Internet options

delete files

delete cookies

(wait for each to finish, may take some time if you don't do it regularly)

restart

May speed you up

[dinasour]

I second that.

You may also wound up with a lot of “addons”, spyware, etc.

Have you run any spyware checks lately.

This is very often the problem with slow computers.

For example:

http://spybot.com/en/index.html