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http://oreilly.com/pub/a/windows/2005/02/08/NTFS_Hacks.html

By default, NTFS creates an 8.3 filename every time it creates a long filename, which adds a bit of time to the file creation process.

One can disable that using:

fsutil behavior set disable8dot3 1

Is it a good idea to do it on a Windows 7 machine running on a SSD drive?

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up vote 1 down vote accepted

16 bit apps use 8.3 filenames.

By far the most prominent 16 bit apps are Setup programs. Not a lot of them, but some.

Like any setting, I'd test all your applications just in case. But for the most part, you should be ok.

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8.3 can be handy when you are trying to remove a file which somehow came to have invalid characters in its filename. –  horatio Sep 16 '11 at 14:13
    
Much truth in your statement, but beware the Dark Side of the Force! –  surfasb Sep 21 '11 at 22:05
    
I haven't seen a 16-bit installer in the wild in years. There had been those ancient InstallShield things that had a 16-bit installer engine but they're quite died out by now. Not to mention that 64-bit systems are increasingly common and no 16-bit process runs on those anyway. –  Joey Jul 30 '12 at 7:53
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