To this day, Windows retains full support for the old MS-DOS 8.3 filename limitation, and it does this by creating 8.3 aliases for files with longer names. Apparently, this has a measurable effect on performance, so naturally, people are going to turn it off to make their Windows installations perform better.
According to the user, this resulted in noticeably smoother scrolling in Tile view. They subsequently repeated the process on several folders they regularly use and reported that searching through files became much faster. The user also claimed that external hard drives became faster and that browsing an Android directory over USB or FTP behaved more like a regular Windows folder, including when copying large numbers of music files.
↫ Sayan Sen at Neowin
You can disable this legacy feature in Windows per volume or globally, but Microsoft is warning users not to do so. Even in 2026, applications and registry entries may depend on 8.3 filenames being available, so removing them can lead to unexpected outcomes. It’s just one of those things you wouldn’t expect to still be around or have a measurable impact in the days of fast SSDs, but there’s enough credibly evidence out there to suggest that yes, it actually does negatively affect performance.
If you’re doing a lot of file operations in Windows, it might be worthwhile to do some testing of your own to see if you can speed things up. Or, you know, you can just not use a house of cards disguised as a serious operating system.
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