Mount ecryptfs volume on Windows

eCryptfs is a filesystem built into the Linux kernel. There is no way to decrypt this data from within Windows.

You can, however, boot an Ubuntu LiveCD, decrypt and recover your data (assuming your have the required keys), using the ecryptfs-recover-private utility.

Complete instructions can be found here:

• http://blog.dustinkirkland.com/2011/04/introducing-ecryptfs-recover-private.html

Full disclosure: I am one of the authors and maintainers of eCryptfs.