Windows 10 Pro 64bit Driver Signature Enforcement is ON, forcing non-signed files to be rejected and the device driver not installed. Using the Device Manager - Realtek High Definition Audio. Device Manager has a yellow exclamation mark against 'Realtek High Definition Audio' under Sound, video and game controllers. It seems that the Windows signature was not valid for files in the Realtek High Definition Audio 64 bit installation software (ASUS link to Global Download 64bit) that was recommended to install. Audio_Realtek_Win10_64_VER6017989. Dell Bluetooth Mouse Driver Windows 10 here. zip The Device Drivers properties showed the following Windows cannot verify the digital signature for the drivers required for this device.

Cricut Drivers For Windows 10. A recent hardware or software change might have installed a file that is signed incorrectly or damaged, or that might be malicious software from an unknown source. (Code 52) On investigation of the driver files it seems that the Realtek installation installed the file C: Windows System32 drivers ksthunk.sys which had no Windows signature. I searched Microsoft, ASUS and Realtek web sites as well as www but I was unable to find any details. I decided to delete the offending file using regedit I delete this key (including child). HKEY_LOCAL_MACHINE SYSTEM Services ksthunk I was unable to delete the file C: Windows System32 drivers ksthunk.sys. Require permission from TrustedInstaller to make changes to the file.