Issue installing Cygwin 1.5.25-15: packages are downloaded, but setup exits prior to installation

[Nate Meyer]

To preface this, I did search the archives first, apologizes if I
missed something.

OS: Windows Vista x64
Installation Path: c:\cygwin
Download Path: j:\temp

Issue:
When I attempt to install the latest version of Cygwin the packages
are downloaded successfully, and I receive a dialog box titled
"set_sygdrive_flags" that says, "The operation completely
sucessfully." Clicking OK in this dialog immediately closes the
installer.

I wind up with a series of empty directories under c:\cygwin. All of
the packages seem to have been download to j:\temp as there is 900mb
or so of data there, but it is not actually installing.

I have tried installing from the internet, as well as installing from
a local directory. Installing from a local directory produces the same
behavior, minus the download of course.

I have tried different mirrors and the behavior is the same. The
installer is running with admin privileges. I have tried completely
deleting c:\cygwin and reinstalling.

At this point I'm a little unsure of where the issue could lie.
Following this email, I'll be disabling everything I can with msconfig
and attempting reinstallation. This seems like a longshot to me.

Any other suggestions?

Nate Meyer
natemeyer.net

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