Understanding and Fixing the "A Custom Scale Factor is Set" Error in Windows
What This Error Means
Windows is warning you that your display scaling is set to a non-standard value. Display scaling controls how large text, apps, and other items appear on your screen. While Windows recommends specific scaling values (like 100%, 125%, 150%, etc.), sometimes custom values get set (like 117% or 133%).
Why This Matters
- App Compatibility: Some applications may appear blurry or incorrectly sized with custom scaling
- Display Issues: You might see graphical glitches or improperly aligned windows
- Performance: Non-standard scaling can sometimes impact performance
Detailed Fixes
Method 1: The Simple Solution (Best for Most Users)
- Click "Turn off custom scaling and sign out" (as shown in your screenshot)
- Windows will: Reset scaling to the recommended value (100% in your case) Sign you out to apply changes
- Simply sign back in - your display will now use standard scaling
Method 2: Manual Adjustment
- Under "Change the size of text, apps, and other items": Select the dropdown menu Choose "100% (Recommended)" (or another standard option like 125% if you prefer)
- Click "Apply"
- Restart your computer to ensure all applications recognize the change
Method 3: Advanced Scaling Settings
If 100% feels too small but you want to avoid custom scaling:
- Click "Advanced scaling settings"
- Enter a standard value (like 125%)
- Click "Apply"
- Sign out and back in
Prevention Tips
- Avoid using third-party tools that modify display settings
- When connecting external monitors, let Windows set the recommended scaling first
- Update your graphics drivers regularly
When You Might Want Custom Scaling
The only time you'd want to keep custom scaling is if:
- You have very specific vision needs
- You're using an unusual display setup
- A particular application requires it
For most users, sticking with the recommended scaling values (100%, 125%, 150%, etc.) provides the best experience.
