A:Answer What is the Windows Operating System for the Desktop that you have the LG 27'' UltraGear™ QHD Nano IPS 1ms 144Hz G-SYNC Compatible Gaming Monitor, Model # 27GN850-B connected to? A blurry monitor can occur for several reasons such as bad resolution settings, non-matching cable connections or a dirty screen. Select Display > Change the size of text, apps, and other items, and then adjust the slider for each monitor. Right-click the application, select Properties, select the Compatibility tab, and then select the Disable display scaling on high DPI settings check box. You can also click on the start menu then type 'Control Panel'. For the 'Best Match' click 'Control Panel' On the screen that opens up where it says 'View By', click on the drop down menu and make sure it is set to 'large icons', then click on the 'Display option'. Under 'Change only the size of items' is a hyperlink that says 'set custom scaling level'. Left click on that then where it says 'Scale to the percentage of normal size' click in the field that will probably be showing 100%. On the drop down menu of different percentages to select, click on a percentage that you want to try. You will need to restart your computer for the changes to take effect. If that does not clear up the blurriness, you can repeat the procedure to select a different percentage until you find one that works for you. If in doubt, please contact your desktop's manufacturer for assistance...^IFV