HKLM\SYSTEM\CurrentControlSet\Control\FileSystem
| Data type | Range | Default value |
|---|---|---|
| REG_DWORD | 0 | 1 | 0 |
Determines whether NTFS generates an 8.3-format short name for long file names, and for file names which contain characters from the extended character set. If the value of this entry is 0, files can have two names: the user-specified name and the NTFS-generated short name. If the name the user specifies conforms to 8.3, no short file name is generated.
Changing this value does not change the file, but it does change the way NTFS displays and manages the file.
| Value | Meaning |
| 0 | NTFS creates short file names. This setting enables applications that cannot process long file names and computers that use different code pages to find the files. |
| 1 | NTFS does not create short file names. Although this setting increases file performance, applications that cannot process long file names and computers that use different code pages might not be able to find the files. |
You must restart the system before a change to this value takes effect.