Udfs Service Defaults in Windows 7

Reads/Writes UDF 1.02,1.5,2.0x,2.5 disc formats, usually found on C/DVD discs. (Core) (All pieces).

Default Settings

Startup type:Disabled
Display name:Udfs
Service name:udfs
Service type:filesys
Error control:normal
Group:Boot File System
Path:%SystemRoot%\system32\DRIVERS\udfs.sys
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\udfs

Default Behavior

Udfs is a file system driver. In Windows 7 it is disabled and therefore it isn't starting. If Udfs fails to start, Windows 7 attempts to write the failure details into Event Log. Then Windows 7 startup should proceed and the user should be notified that the udfs service is not running because of the error.

Restore Default Startup Configuration for Udfs

1. Select your Windows 7 edition and service pack, and then click Download.

2. Save the Win7_udfs_Service_Startup.cmd file to a local storage device.

3. Run the saved file as an administrator.

4. Restart the computer.

The udfs service is using the udfs.sys file that is located in the %WinDir%\system32\DRIVERS folder. If the file is changed, damaged or deleted, you can restore its original version from Windows 7 installation media.