Mcafee Home Page Since Adding The Free Mcafee Security Center, My Computer Slowed Down Loading Home Page, What Caused This?

Since adding the free mcafee security center, my computer slowed down loading home page, what caused this? - mcafee home page

Because it is scanning the page, do to ensure that there is a site of known malware.
But you can disable this option if you know where and where not to go on the Internet.
But you can never be sure, new malicious sites appear every day.
If the slowdown is only on the main page only, you are probably better to leave him in power.