Maximum Protection

I've been trying to uninstall my McAfee antivirus software for a few days now, not to mention the sleepless nights that go with them. I finally succeeded, and as tech support claims, all the McAfee components are wiped out from my computer. But McAfee Personal Firewall Plus is still on. Spooky, eh?

I need to switch it off and I need to do it urgently.

If anyone has had any experience with McAfee, please help me - I'm kinda desperate. Thanks in advance.