If the worst comes to the worst we can remove viruses from your computer and install the latest security updates, and train you to look after your PC's basic needs, keeping the viruses and hackers away from your system. The first line of defense is usually your browser, make sure that your browser settings allow easy access to sites you use regularly and block potentially harmful sites from downloading suspicious software and redirecting you to unsavoury sites. To do this sucessfully you must look at your Internet Settings. These can be found by navigating to the 'Control Panel' ( Start/ Settings/ Control Panel) select 'Internet Options' from the list or this icon or by opening Internet Explorer (Tools tab and scroll to last item on the drop down menu 'Internet Options')