Try runnning IE without any add ons and see if it's stable, if it is then it's one of your add ons causing the problem. click so... Click Start -> All Programs -> Accessories -> System Tools, and then click Internet Explorer (No Add-ons).
If it works OK, then you'll need to dissable all your add-ons (tools > add ons) and then start enabling them one by one to find out what the problem is.
If it's not add-ons then try reinstalling IE8
http://www.microsoft..../worldwide-sites.aspx
Though the best advice might be to give up using IE all together and switch to a different browser such as firefox.
http://firefox.orghtt...urope.org/en/firefox/