Filter Manager causes Freeze

Yea and there was nothing there that said "Avgmfx64

Can you go back with system restore to good times?

Explain what you mean by good times?

Before you began having the problem

I have had the problem for ages (like a year).

OK
We went with your idea that it was the AV, now we know that is not the way to go. We will start from scratch
Make a clean boot,
If the problem is gone, follow instructions to permanently prevent the problem
How to troubleshoot a problem by performing a clean boot in Windows Vista or in Windows 7

Ok I've started the clean boot and selected half of those checkboxes. So if I'm right... If the problem comes again it has something to so with them ones I selected and if not I select the second half of the check boxes?

If it works in clean boot you put back a few at at time
When it comes back you know the cause is from one of the few that you just put back.
The problem would be from the ones that you did not change.

To understand each other.
If you selected half to be removed and you get the problem, the problem is from the half that was not removed.

Ok so I checkboxed the top half (which is about 9-10) and the problem is still coming back so now I gradually take one off them ones.

Follow the clean boot instructions exactly.
Take them all out
If the problem is gone, put a few back at a time, until the problem returns
If you take them all out and the problem still comes back, we know we have to look elsewhere. Then just put them all back,