ATC window size

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My ATC window size has changed, I think the sim thinks there is more to it on the right(if that makes sense) so even if i stretch is as far as I can it does nothing realy. When I click it and you see the "boundary" it goes around the top, left,bottom but when it come to the right it extends more than half a screen.
The writing is squashed up and unreadable.

FSX
please help
James

P.S. I made no changes to settings recently, it just happened yesterday, or today I don't remember.

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On a different matter whenever I click anything in the cockpit the sim freezes for a second then is okay, If I enter the cockpit view(any of them including v/c) it freezes for a second then is fine. Any ideas?

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Sorry if this is in the wrong space, i just thought screen size, i dod nothing, probably a windows setting.