Kernel Cryptography, Next Generation by Microsoft Corporation.
This service also exists in Windows 11 and 8.
Windows 10 version | Home | Pro | Education | Enterprise |
---|---|---|---|---|
1507 | Boot | Boot | Boot | Boot |
1511 | Boot | Boot | Boot | Boot |
1607 | Boot | Boot | Boot | Boot |
1703 | Boot | Boot | Boot | Boot |
1709 | Boot | Boot | Boot | Boot |
1803 | Boot | Boot | Boot | Boot |
1809 | Boot | Boot | Boot | Boot |
1903 | Boot | Boot | Boot | Boot |
1909 | Boot | Boot | Boot | Boot |
2004 | Boot | Boot | Boot | Boot |
20H2 | Boot | Boot | Boot | Boot |
21H1 | Boot | Boot | Boot | Boot |
21H2 | Boot | Boot | Boot | Boot |
22H2 | Boot | Boot | Boot | Boot |
Display name: | CNG |
Service name: | CNG |
Type: | kernel |
Path: | %WinDir%\System32\Drivers\cng.sys |
Error control: | critical |
Group: | Core |
The CNG service is a kernel mode driver. If CNG fails to load or initialize, the error is logged and the computer attempts to restart, using the Last Known Good configuration. If the Last Known Good configuration fails, Windows 10 startup also fails, and the boot process halts with a Stop error. If you disable this service, Windows 10 will fail to start. Do NOT change this service startup configuration if your computer is working.
1. Select your Windows 10 edition and release, and then click on the Download button below.
2. Save the RestoreCNGWindows10.bat file to any folder on your hard drive.
3. Right-click the downloaded batch file and select Run as administrator.
4. Restart the computer to save changes.
Note. Make sure that the cng.sys
file exists in the %WinDir%\System32\Drivers
folder. If this file is missing you can try to restore it from your Windows 10 installation media.