Fix Blurry Apps on Windows 10 & 11

Quick diagnosis — which type of blurriness?

Fix A — Set the correct DPI scaling

Go to Settings → System → Display → Scale and select the recommended value for your screen size. Always use a value from the dropdown — custom percentages like 137% cause pixel mapping issues that make everything look soft.

After changing: sign out and sign back in. Do not just click Apply and continue — leftover processes still render at the old DPI and look blurry until restarted.

Fix B — Per-app DPI override (Windows built-in)

For a specific blurry app, Windows has a built-in override that tells the OS how to handle DPI scaling for that process.

Steps

1. Find the app's .exe — right-click the shortcut → Open file location.

2. Right-click the .exe → Properties → Compatibility tab → Change high DPI settings.

3. Tick Override high DPI scaling behaviour. Try these in order: Application → System (Enhanced) → System. Restart the app after each to test.

Fix B (automated) — Display EX DPI Override manager

Display EX's DPI Override manager fixes any number of apps in one place and applies the overrides automatically on every launch — no need to edit properties for each executable every time Windows updates.

Open Display EX → DPI Overrides → Add app → select the executable or pick from the running process list → choose the override mode → Save. Done. The app will launch with correct DPI applied from that point on.

Display EX also has a Scan for blurry apps feature that automatically detects running applications using incompatible DPI modes and suggests overrides for them.

For a full step-by-step guide see Fix blurry apps on 4K / HiDPI monitors.

Fix C — Apps blurry after moving between monitors

On a dual-monitor setup with different DPI values (e.g. 4K at 150% + 1080p at 100%), dragging an app from one screen to the other often leaves it blurry. The app rendered for the source screen's DPI and Windows is stretching it to fill the target screen.

Immediate fix

Close and reopen the app on the target monitor. Most apps re-render correctly when opened fresh on a screen rather than dragged there.

Permanent fix with Display EX

Enable Auto re-apply DPI on monitor change in Display EX settings. When a window moves to a different DPI screen, Display EX triggers a DPI refresh cycle that prompts the app to re-render at the new scale.

Fix D — ClearType calibration for soft text

ClearType is Windows' subpixel font rendering. If it's calibrated for the wrong monitor type, text looks slightly "soft" or smeared even when everything else is set correctly. Takes 2 minutes to fix.

Search ClearType in the Start Menu → open Adjust ClearType text → tick Turn on ClearType → follow the wizard, picking the sample that looks sharpest to your eye on each screen.

Display EX includes a built-in ClearType tool under Tools → ClearType Calibration that lets you save separate settings per display profile — useful when switching between monitors with different subpixel layouts.