Clearing File Associations

Benjamin Benavides

• 1 min read 
# Clear file association for .PDF files
$extension = ".pdf"
$progId = ""

# Remove the file association
Remove-Item "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\$extension" -Recurse

# Clear the user choice
Remove-ItemProperty "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\$extension\UserChoice" -Name ProgId -ErrorAction SilentlyContinue

# Set the ProgId to an empty string
Set-ItemProperty "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\$extension\UserChoice" -Name ProgId -Value $progId -ErrorAction SilentlyContinue

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