My name is Bijon,from The Dell Social Media and Community Team
In response to your query, "I am having trouble installing McAfee Antivirus", please follow the below instructions
Open Interent explorer,click on tools and then click on "Manage Add-ons".
On the new page which opens please check for the heading "Sun Microsystems, Inc" under Toolbars and extension
Below "Sun Microsystems, Inc" you will find java plug-In,if it is disabled, highlight the "java plug-In" and click on enable
Alternatively you may also download java by using this link
Thanks & Regards
Dell Social Media Responder