Runs `fsutil behavior set disable8dot3 1`. For every long filename, NTFS also generates an MS-DOS-era 8.3 short name (e.g. PROGRA~1) — pure overhead on a modern system, and a measurable slowdown when a folder holds thousands of files (each create/rename has to compute and collision-check the short name). Disabling it speeds up file creation in big directories and trims metadata. Only matters for ancient 16-bit apps that reference short names, which essentially nothing does in 2026. Applies to newly created files. Revert re-enables 8.3 creation.
MaxTweaks applies this tweak with one click and snapshots your original setting first, so you can revert it cleanly at any time. A System Restore point is offered before batch changes, and every tweak links to its official source.
Get MaxTweaksOfficial documentation: https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/fsutil-8dot3name