It is often located in C:\Windows\System32\drivers\ .
Instead of searching for , consider these better, safer solutions. download secdrv.sys
If you are absolutely certain you need the original driver and you are running Windows 7 or 8.1 (not recommended for online systems), you can re-enable secdrv.sys by removing KB3086255. It is often located in C:\Windows\System32\drivers\
Even if you have the file, modern Windows will refuse to load it because it lacks a modern digital signature. You must manually sign it and enable "Test Mode": Download the SDK: Install the Windows 10 SDK to get tools like makecert.exe signtool.exe Enable Test Mode: Open PowerShell as Administrator and run: bcdedit /set "{current}" testsigning on Sign the Driver: consider these better