Fonts C:\Windows\Fonts

Fonts installed for all users of the computer (TrueType, OpenType and others); registered in the registry.

Updated on 12 November 2026 By AltF4 Formation

What it’s for

C:\Windows\Fonts (%windir%\Fonts) is the folder of fonts installed for the whole machine. For a font to be permanently available, its file must be copied here and then registered, through Control Panel or the AddFontResource(Ex) API.

What it contains

The font files shipped with Windows and those added by users or software: .ttf, .otf, .ttc, .fon.
No inventory in the folder itself: permanent fonts are declared under HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Fonts.
File Explorer shows it in a special view that groups font families.
Fonts installed for a single user live elsewhere, in %LOCALAPPDATA%\Microsoft\Windows\Fonts, as of Windows 10 version 1809.

Risks and best practices

Do not delete system fonts: the interface can become unreadable and applications can fail.
Install a font through File Explorer (right-click > Install) or a deployment, not by plain copy: installation is what registers it in the registry.
A font locked by an application is removed in two steps: delete its registry value, then restart before deleting the file.
Inconsistent font rendering is often fixed by restarting the FontCache service.
Fonts from unknown sources are an attack vector: install trusted fonts only.

Useful commands

# Fonts declared in the registry (name -> file)
Get-ItemProperty 'HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Fonts'

# Largest files in the folder
Get-ChildItem "$env:windir\Fonts" -File | Sort-Object Length -Descending | Select-Object -First 10 Name, Length

# Available font families
Add-Type -AssemblyName System.Drawing
(New-Object System.Drawing.Text.InstalledFontCollection).Families.Name

# Restart the font cache service
Restart-Service FontCache

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