Windwos 7 screen resolution problem

When I switch between different programs in Windows 7, sometimes my screen resolution changes. How can I prevent that windows 7 changes the resolution, can I block the screen resolution to a fixed value ?
MolenBelgiumAsked:
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JohnBusiness Consultant (Owner)Commented:
A device (like a projector or similar) may change the resolution of the screen and you cannot alter this. That is, you cannot prevent resolution change in this kind of circumstance.

Is this what you are referring to?

If Word, Excel, Adobe and other like applications are changing screen resolution, this should not happen.  

If you think regular applications are changing the resolution, try running System File Checker. Run SFC /SCANNOW and allow to complete. Run a second time if errors remain after the first run. Restart the computer and test.

.... Thinkpads_User
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rindiCommented:
This normally only happens if the program you are running isn't properly compatible with windows 7 and the aero display. Check that those programs are fully patched or upgrade them to a properly supported version.
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nobusCommented:
>>  When I switch between different programs in Windows 7  <<  please post which programs do cause it
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MolenBelgiumAuthor Commented:
From Outlook to other Windows  programs
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JohnBusiness Consultant (Owner)Commented:
You may have some issue with your machine. I have many Windows 7 machines (my own and clients) and common Office programs, Adobe and so on do not change screen resolution.

If you ran SFC and that did not change behaviour, next on the list is to run a Windows 7 Repair Install. Below is a Microsoft Support link to do this and below that is a Seven Forums Tutorial to assist you.

http://windows.microsoft.com/en-ca/windows7/start-your-computer-from-a-windows-7-installation-disc-or-usb-flash-drive

http://www.sevenforums.com/tutorials/3413-repair-install.html

... Thinkpads_User
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nobusCommented:
>>  to other Windows  programs  <<  which ones?  
you must realise we can only guess, without info, or offer general solutions, like sfc /scannow, or a repair install or chkdsk
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tliottaCommented:
...to other Windows  programs

Essentially every program you switch to will be a "Windows program" (a DOS program might be an exception example). Since there are tens of thousands of possibilities, some program names would be useful.

Or are you saying that any switch from Outlook to any other program causes a resolution change? If you have Outlook in a window and switch another program in a window, does the resolution still change? (I.e., does the size of the Outlook window get larger or smaller?) And is it a resolution change or just a font size change?

Tom
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MolenBelgiumAuthor Commented:
the resolution  changes, as if an external screen was connected
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nobusCommented:
MolenBelgium (im from there too) if you don't answer us - we can't help much
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