“The creation of 8.3 filenames and directories for all long filenames and directories on NTFS partitions may decrease directory enumeration performance.”

[http://support.microsoft.com/kb/121007]

Find the NtfsDisable8dot3NameCreation entry here:

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Control\\FileSystem 

Set it from 0 (default) to 1 to disable 8.3 Name Creation.

“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.”

[http://blogs.msdn.com/adioltean/archive/2005/01/27/362105.aspx]