How to fix Windows 10 blurry fonts in applications?

I had this problem too but was able to fix it with the specific programs that has the issue (like Steam and Rainmeter). You'll need to do the following:

1. Note down which specific programs have the font problem.
2. Right-click on the program icon (not the shortcut) and choose properties.
3. Click the "Compatibility" tab.
4. Check the box labeled "Disable display scaling on high DPI settings".
5. Restart the program.
6. Repeat for each affected program.

Here is how I solved it the simplest way. Simply set whatever DPI Windows is recommending as a custom DPI. That is, if Windows is recommending 125%, set a custom DPI of 125% and log out and log back in. This works fantastically, at least in the windows 10 build I am using now (Update 1803, Version 10.0.16299.15)

Edit: Also found it to be working great on Update 1809, Version 10.0.17763.134

Update: still default DPI is crap. Setting custom DPI still works with version 1909

Update: this technique still works like charm in Windows version 20H2.

I've managed to get sharp fonts in CMD, Device Manager, etc at once using standard Windows settings UI (i.e., without changing the compatibility settings or using the auto-start registry script).

Basically, you need to go to the Control Panel > Appearance and Personalization > Display and set a custom scaling level to 125%.

The nuance is that the UI won't let you to apply the setting if you already have the recommended 125% setting in the Settings > Display. But there are at least two workarounds:

Workaround 1: You can just set the scaling level to some other value in the Settings > Display UI, just before changing the settings back to 125% in the custom scaling level UI.

Workaround 2: You can set the custom scaling level to some other value in the custom scaling level UI, Apply, choose to re-logon later in the popped dialog, then set the custom scaling level back to 125%, Apply, and re-logon manually.

I've tested both workarounds and they both worked on two of my laptops.

This is a window10 scaling method problem. There is a step by step manual on Lifehacker using a tool that allows you to switch to win8.1 scaling method. This worked fine for me.

Lifehacker Hot To Fix Blurry Fonts