How do I know if I have fonts missing, corrupted, or not displaying correctly issues?

Common symptoms of fonts missing, corrupted, or not displaying correctly include: Text shows as squares, boxes, or question marks instead of letters, System fonts like Segoe UI missing — Windows looks wrong, Installed fonts don't appear in application font lists, Fonts look blurry, jagged, or have wrong weight (bold/thin), Web pages show wrong fonts or missing characters, Some languages or special characters don't display.

Fix Fonts Missing, Corrupted, or Not Displaying

Symptoms

You might be experiencing this problem if you notice:

•Text shows as squares, boxes, or question marks instead of letters
•System fonts like Segoe UI missing — Windows looks wrong
•Installed fonts don't appear in application font lists
•Fonts look blurry, jagged, or have wrong weight (bold/thin)
•Web pages show wrong fonts or missing characters
•Some languages or special characters don't display

Common Causes

⚠Font cache corrupted
⚠System fonts deleted or overwritten by third-party font manager
⚠ClearType or font smoothing disabled
⚠Font files corrupted after disk error or incomplete update
⚠Missing language font packs for non-Latin scripts
⚠Third-party font installations conflicting with system fonts

Solutions

Solution 1: Rebuild Font Cache

1Close all applications
2CMD as Admin:
3net stop FontCache
4net stop FontCache3.0.0.0
5del /f /s /q %WinDir%\ServiceProfiles\LocalService\AppData\Local\FontCache\*
6del /f /s /q %WinDir%\System32\FNTCACHE.DAT
7net start FontCache
8net start FontCache3.0.0.0
9Restart PC — font cache will rebuild

Solution 2: Restore Default System Fonts

1If system fonts are missing:
2Settings → Personalization → Fonts → "Reset all fonts to default values" (if available)
3Manual restore: Control Panel → Fonts → Font settings → "Restore default font settings"
4To reinstall missing fonts from Windows:
5Settings → Apps → Optional features → Add a feature
6Search for language fonts you need (e.g., "Arabic Supplemental Fonts")
7For complete font reset: copy fonts from another Windows install
8Copy from C:\Windows\Fonts on a working PC to yours

Solution 3: Fix Font Rendering

1If fonts look blurry or jagged:
2Search "ClearType" → Run "Adjust ClearType text"
3Follow the wizard — choose the best-looking text samples
4For high-DPI blurriness: Settings → System → Display → Scale
5Try 100%, 125%, or 150% — some apps don't scale well
6Per-app fix: right-click app → Properties → Compatibility
7Check "Override high DPI scaling behavior" → select "System (Enhanced)"
8Registry: HKEY_CURRENT_USER\Control Panel\Desktop → "FontSmoothing" should be "2"

FIXES THIS IN 5 MINUTES