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I know this is a quite odd question, and I don't really know how to provide more elements to help you find a question. All I can say is that, suddenly, every window that has the chance to maximize itself will start maximized. One of the many examples is Chrome's preferences window, that should be a fairly small window but opens at full screen (1920x1080). Do someone have a clue?

Please help me in finding some more elements to get a proper solution.

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Did you install any software lately? Have you scanned for malware? – Moab Jan 30 '11 at 20:16
I have no malware (McAfee weekly scan) and I really can't figure out the exact moment this behaviour started... So I can't tell exactly about the software. – Claudio Mezzasalma Jan 30 '11 at 20:55

An old registry hack for XP to force this behavior was to add a registry DWORD


DWORD= maximizeapps

set value to 1

Maybe this was added somehow?


You can use Microsoft System Restore, pick a date before this problem began


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I tried but the key was not present. I added with value = 0 but didn't help. – Claudio Mezzasalma Jan 30 '11 at 20:55
Did you scan for malware? – Moab Jan 30 '11 at 20:59
Yes, I have McAfee in continous protection and weekly scanning and no threat. – Claudio Mezzasalma Jan 30 '11 at 21:34
Try the System Restore – Moab Jan 30 '11 at 22:35
I really can't say when the problem started, so I can't choose a date for System Restore... I don't even know if I could go back enough. – Claudio Mezzasalma Jan 31 '11 at 8:27
up vote 0 down vote accepted

I finally find the answer. It was Ati Catalyst's Desktop Manager: I disabled "Preserve Application Position and Size" in it and my popups now are ok.

share|improve this answer
Thanks for posting the solution – Moab Mar 25 '12 at 2:28

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