To change the refresh frequency for your monitor
Open Display in Control Panel.
On the Settings tab, click Advanced.
On the Monitor tab, in the Refresh Frequency list, click a new refresh rate
To open Display, click Start, click Control Panel, click Appearance and Themes, and then click Display.
The default refresh frequency setting is 100 Hertz, although your monitor may support a higher setting. Check your manufacturer's documentation for information regarding the settings your monitor supports.
A higher refresh frequency reduces any flicker on your screen, but choosing a setting that is too high for your monitor can make your display unusable and cause damage to your hardware.
Changes to the refresh frequency affect all users that log on to the computer.