McAfee not working?

Im at the end im fed up, I want to install my McAfee on my home computer, I scanned my computer, Everything is fixed. My home computer has no infections on it AT ALL.

It also says HTTP Error 501/505. Anyone know how to fix it?

I am getting 2 screens.

Screen 1 :

http://img40.imageshack.us/img40/8875/security2.png

Screen 2:

http://img40.imageshack.us/img40/2365/security.png

I contacted McAfee they said there is a infection on my home comp, Which i know there isnt because its been scanned and given the all clear by BullGuard anti-virus.

Try using a different browser, like firefox.

Nope, It dont work :(

Use a better bit of protection, McAfee is crap.

Ive bought it now, I just need to get on there website on my other computer but i cant.