I'm sure everyone would jump at the chance of doubling battery life, an impossible dream unfortunately. With these fake anti-malware pests, if you realise it's happening don't click on anything, even the 'X" to close it, just power off.
Did you try jumping back in time to before it all happened by using System Restore?
If successful temporarily disable System Restore in order to delete the infected restore point.
If not possible try Stinger and Malwarebytes Free linked in the last clickable link in my signature below.
It seems to have been resolved by deleting the file entitled 0.6etc.exe. After posting this I completed a full McAfee scan and it removed three files so I thought that should be OK?
Have given my wife a crash course in what to do and not to with dodgy pop ups!
It may be but to be sure run Stinger and Malwarebytes Free just in case. Uninstall Stinger after use as it doesn't update automatically.
It's just come back. I rebooted in safe mode and there was a file in the same place as before, which I deleted. I'm just downloading malwarebytes, thanks for the link.
You can't restore the computer to before all this happended using System Restore?
If not & all else fails then try the Hijackthis routine listed near the bottom of that link in my signtaure and post its log on one of the forums I listed there.