If you do insist on using internet explorer (though I too would recomend changing browser) then it's normally one of the add-ons you have installed for IE that causes IE to crash, rather than IE itself.
You can start IE in safe mode (with no add-ons) from start > all programs > accessories > system tools > internet explorer (no add-ons)
If it works in safe mode then you need to disable all add-ons manually and then start enabling them one at a time until you find the one causing the problem.