[Patrick]

I have Windows Vista and today my computer was working fine and then suddenly I got a pop up saying:

'Windows Explorer has stopped working' followed by 'Windows Explorer is restarting...'

And this causes the computer to generally be annoying, lag and slow down.
This happens OVER...and OVER..and OVER again.

I get a bubble Bottom Right of the screen saying to 'Turn on Security Center' to fix the problem.
So I try to and it tells me 'Security Center was unable to run'.

Apparently this is down to McAfee Security automatically turning Security Centre off, so I tried Un-Installing McAfee, but I couldn't get onto Control Panel because the computer KEEPS crashing.

I even system restored the computer back to Friday afternoon, and it's STILL doing it.

What should I do honestly?