Cygwin home looking at wrong directory

[xmoon 2000]

 My IT just installed Cygwin on a machine with 2 drives c and d.

They appear to have installed on both drives (not sure why!)

How can I tell Cygwin which drive I want it to use?

There is NO windows environment HOME variable set.

So how is it choosing D drive version over the C drive version that I want?

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