Mcafee Internet Security block

Hello,

I had installed McAfee Internet Security 2010 but after the installation, the internet doesn't work and when I open the window media player program it freezes. With internet, when I open the internet explorer the connection freezes and stops.

However, after I uninstalled the McAfee software, I'm able to use the internet and the media player fine.
I've Mcafee before but didnt any problems then.
Any suggestions has to how to this fix because I dont have internet security on my pc at the moment but would to using McAfee.
Thank you