A simple PowerShell script to install all fonts of a certain type in a folder. Adapted from this Stack Overflow question: https://stackoverflow.com/questions/77829662/a-powershell-script-to-install-fonts-on-windows-11

install_fonts.ps1

param (
    # Folder to search recursively for fonts to install
    [string]$Folder = "$Env:USERPROFILE\Fonts\Ensure Installed",
    # Array of glob patterns to match 
    [string[]]$Types = ("*.fon", "*.otf", "*.ttc", "*.ttf")
)

# Go through all folders in source and list all files
if (Test-Path -Path $Folder -Type Container) {
    $fontList = Get-ChildItem `
        -Path $Folder `
        -Include $Types `
        -Recurse
}

# Check if there are fonts
if ($fontList) {
    foreach ($font in $fontList) {
        Write-Host "Installing font - $($font.BaseName) ($($font.Extension.SubString(1)))"
        try {
            Copy-Item `
                -Path $font `
                -Destination "C:\Windows\Fonts" `
                -ErrorAction Stop
        } catch {
            # Handle the PermissionDenied exception
            switch ($_.CategoryInfo.Category) {
                PermissionDenied {
                    Write-Host "You don't have the necessary permissions"
                    exit 1
                }
                default { throw }
            }
        }

        try {
            # Register font for all users
            New-ItemProperty `
                -Name $font.BaseName `
                -Path "HKLM:\Software\Microsoft\Windows NT\CurrentVersion\Fonts" `
                -PropertyType string `
                -Value $font.Name `
                -ErrorAction Stop
        } catch {
            # Handle the ResourceExists exception
            switch ($_.CategoryInfo.Category) {
                ResourceExists { Write-Host "The font has already been installed" }
                default { throw }
            }
        }
    }
} else {
    Write-Host "There were no fonts to install in $Folder"
}