ok i found out a way by which u can create these folders

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CON, PRN, AUX, CLOCK$, NUL, COM1, COM2, COM3, COM4, COM5, COM6, COM7,
COM8, COM9, LPT1, LPT2, LPT3, LPT4, LPT5, LPT6, LPT7, LPT8, and LPT9
there you go the full list of what you CANT use as a directory or filename
the reason comes from DOS
UNIX to be more precise these are all device names and correspond to
harware handlers
/dev/nul /dev/lp etc
in UNIX
so you cant name yer files to them
but if you REAAALLY want to do it
in shell
do c:\>mkdir \\.\c:\com
and to remove do c:\>rmdir \\.\c:\com
and bill gates can suck my D...!!! :P