Cant change resolution windows 7

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The larger the monitor, usually the higher the resolution it supports.

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LCD monitors, also called flat-panel displays, and laptop screens often support higher resolutions and work best at a specific resolution. CRT monitors generally display a resolution of 800 × 600 or 1024 × 768 pixels and can work well at different resolutions.

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The resolution you can use depends on the resolutions your monitor supports. At lower resolutions, such as 800 x 600 pixels, fewer items fit on the screen, but they appear larger. They also appear smaller so more items can fit on the screen. At higher resolutions, such as 1600 x 1200 pixels, items appear sharper. Screen resolution refers to the clarity of the text and images displayed on your screen.

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We recommend you move to a Windows 11 PC to continue to receive security updates from Microsoft. Support for Windows 7 ended on January 14, 2020