How to navigate to a directory in C:\ with Cygwin?
Use:
cd /cygdrive/c
I'll add something that helps me out a lot with cygwin. Whenever setting up a new system, I always do this
ln -s /cygdrive/c /c
This creates a symbolic link to /cygdrive/c with a new file called /c (in the home directory)
Then you can do this in your shell
cd /c/Foo
cd /c/
Very handy.