Vista - Windows will not come into focus

A strange problem has turned up on my system that is driving me crazy. When
I launch anything at all, even explorer windows or apps, they never ever
come into focus, they just sit there behind all the other windows, even
though the taskbar says they are the windows in focus. I tried restoring
back to well before the issue started, no help.

Anyone have any other suggestions? Oh and for the record no software was
installed or updated before this began, it just started doing it. I have
had a look online and tried a couple of suggestions that popped up, all to
no avail.

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