I regard Firefox as being considerably more secure than Internet Explorer however you cannot delete Internet Explorer as it is needed to update Windows. Just make sure Internet Explorer does not access the internet except on the rare occasions you need to update windows. In addition to firefox you need a good firewall. Google ZoneAlarm, it's good and a free version is available for download. You also need a AntiVirus program (google AntiVir and AVG, both are good and free). You also need a good adware/spyware program. Google Spybot S&D, it's also free. Only when you are running all of these programs can you feel safe from hackers, viruses or spyware.