"Just wondering. If i were to uninstall IE and install Firefox would that make a difference?"
if your browser has been hijacked and there is a trojan lurking in your registry, uninstalling and reinstalling is not going to fix that. You will need to identify that trouble maker and do a manual delection. Some of the more sophisticated trojans will prove to be a lot harder to get rid off.
"I have had a look on Nortons security section for locking the homepage. However, i can't seem to locate where i can do that."
what version of Nortin are you using ? It should be in its anti-phishing section.
