How to fix blurry text in Windows 10 with multiple monitors

A very overlooked solution is to turn the sharpness way down, to less than 10. That along with the other suggestions here, like turning off all the post-processing settings on the tv, helped as well- overscan off, adaptive contrast, etc.

I was able to fix this very easily by doing the following:

1. Right-click on the desktop on one monitor and select Display Settings
2. Click Advanced Scaling Settings
3. Turn off Let Windows try to fix apps so they're not blurry
4. Repeat steps 1-3 for the second monitor

I think Windows has an issue with having the above fix blurry setting on for 1 monitor and not the other where the monitor resolutions are different for each monitor. Hopes this helps someone.

This solution is based on hints from the solution posted by @rdhainaut. His "Solution 2" worked for one app, but I did not want to do it for every app individually so I guessed that the global setting must somehow not be taking effect.

Here is what worked for me

• Set scaling to 125% for ALL monitors, including the laptop screen (1)
• Restart computer
• Set scaling to 100% for all monitors
• Restart

Now all good.

(1) Display Settings -> Scale and Layout -> "Change the size of text, apps and other items"

In case this helps anyone...

When I changed from HDMI2 to HDMI1, the image got better. Probably the HDMI2 input was somewhat broken. I'll never know for sure. Sometimes you are just blaming the wrong thing...

To fix this issue, please check Start -> after that Settings => after that System => after that Display tab Verify the drivers to be installed

Had The same problem. I solved it by replacing the vga cable with an hdmi one.

In my case the point was that windows wasn't properly recognizing mi monitor aspect ratio, that actualy was 16:10 and, for this reason, it was only offering resolutions suitable for 16:9 displays. I figured this out setting the resolution to a value higher than the supported one, then monitor was asking for a 1920*1200 resolution while in the windows settings page there was only the wrong ratio 1920*1080. I also noticed that in this case windows wont mark none of the resolution available as the 'recommended'.

I had similar issue with a blurry screen when connecting in Windows 10 wirelessly to another laptop screen, extended mode.

The wireless display was scaled to 85% with an unnecessary black border around.

The issue was with the Intel Graphics Settings.

Steps to solve it:

• Right click Desktop > Intel Graphics Settings
• Display > Wireless Display
• Picture Size <-- change to 100%

In case this helps anyone else, I experienced the same symptoms as rdhainaut driving a pair of Dell U2419H monitors from an XPS 15 (9560) laptop through a WD15 dock with single Display Port output and the second monitor chained to the first via DP.

The second monitor was blurred with migraine inducing vibration on the text.

Solution for me came through the Intel HD Graphics Control Panel which allows the refresh rate to be set for each monitor and importantly offers choices including 60i Hz and 60p Hz corresponding to interlaced and progressive.

My primary display was on progressive and the secondary on interlaced. Matching the setting for both displays resolved the blurred/vibrating text. Full process was

1. rClick Desktop > Intel Graphics Settings
2. Display > General
3. Select Display > Digital Display
4. Set Refresh Rate: Select 60p Hz

Repeat steps 3 and 3 for Digital Display2.

Apart from all other solutions mentioned, the following worked for me:

Switch the external monitor (that shows blurry apps) as your main monitor'.

STEPS:

• right click on desktop and click 'Display settings'
• Select the external monitor and check the 'Make this my main monitor' checkbox

You can try to use a different high-DPI compatibility setting for that app instead of the Let Windows try to fix apps so they’re not blurry setting.

• Enter the name of the program in the search box on the taskbar, right-click the search result, and then select Open file location.
• Right-click the program, select Properties, and then select the
• Compatibility tab. click Change high DPI settings
• Select Use this setting to fix scaling problems for this program… check box
• Use I signed in to Windows option
• Select the Override high DPI scaling behavior check box
• Use Application option
• Press OK and OK . Then Restart the program

References :-

• Fix apps that appear blurry in Windows 10 - Windows Help https://support.microsoft.com/en-us/help/4091364/windows-10-fix-blurry-apps
• Make older programs compatible with this version of Windows - Windows Help https://support.microsoft.com/en-us/help/15078/windows-make-older-programs-compatible

Windows 10 still can't do scaling properly. But there is a workaround for this.

1. Connect the external display.
2. Go to display settings and set your screen with lower DPI that has 100% scale factor as the primary screen (there is a checkbox at the bottom of this screen).
3. Log out and log in. Now both screens should have crisp text.

If you disconnect external display you'll get blurry text on the laptop, but don't worry - if you log out and log in it should be fixed. If you connect monitor, you need to log out and log in again. It is annoying, but I did not find a better way and Microsoft just doesn't care.