Encrypting File System (EFS) - Windows 7 Service
Provides the core file encryption technology used to store encrypted files on NTFS file system volumes. If this service is stopped or disabled, applications will be unable to access encrypted files.
This service also exists in Windows 10, 11 and 8.
Startup Type
| Windows 7 edition | without SP | SP1 |
|---|---|---|
| Starter | Manual | Manual |
| Home Basic | Manual | Manual |
| Home Premium | Manual | Manual |
| Professional | Manual | Manual |
| Ultimate | Manual | Manual |
| Enterprise | Manual | Manual |
Default Properties
| Display name: | Encrypting File System (EFS) |
| Service name: | EFS |
| Type: | share |
| Path: | %WinDir%\System32\lsass.exe |
| Error control: | normal |
| Object: | LocalSystem |
| Privileges: |
|
Default Behavior
The Encrypting File System (EFS) service runs as LocalSystem in a shared process. It shares the executable file with other services. If the Encrypting File System (EFS) fails to load or initialize, the error is recorded into the Event Log. Windows 7 startup should proceed, but a message box is displayed informing you that the EFS service has failed to start.
Dependencies
Encrypting File System (EFS) will not start, if the Remote Procedure Call (RPC) service is stopped or disabled.
Restore Default Startup Type of Encrypting File System (EFS)
Automated Restore
1. Select your Windows 7 edition and Service Pack, and then click on the Download button below.
2. Save the RestoreEncryptingFileSystemEFSWindows7.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 lsass.exe file exists in the %WinDir%\System32 folder. If this file is missing you can try to restore it from your Windows 7 installation media.