Oem56.inf -

oem56.inf is not a standard Microsoft file. It is a third-party driver setup information file . The "56" is a counter. Every time you install a non-Microsoft driver (for a printer, GPU, USB dongle, ancient webcam, etc.), Windows renames the driver's .inf file to oemN.inf where N is the next available number.

Some oem56.inf files are empty except for a single line – those are broken installers that failed to clean up. Part 3: The Secret Life of oem56.inf This file is part of a paired set . For every oem56.inf , there is a corresponding oem56.PNF (precompiled setup file) in the same folder, plus driver binaries ( .sys , .dll ) in C:\Windows\System32\drivers or a subfolder. oem56.inf

$inf = Get-Content "C:\Windows\inf\oem56.inf" -ErrorAction SilentlyContinue if ($inf -match "\[Manufacturer\]") Select-String -Pattern "^%?\w+%?=").ToString().Split('=')[1] Write-Host "Manufacturer: $manufacturer" Every time you install a non-Microsoft driver (for