Windows native VIM change the file property in Cygwin

Hi,

I have a file, say "test.txt", in Cygwin, which does not have
executable property. The file property is
-rw-------+ 1 user Domain Users 16 May 30 16:04 test.txt

After I edited it with Windows native vim and saved the file, I can
see it has executable property in Cygwin. The file property now is
-rwx------+ 1 robert_bu Domain Users 16 May 30 16:10 test.txt*

Is there any way to tell Windows VIM to preserve the original file
property?

Thanks.
Robert

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