I can not download ubuntu-xenial-16.04 via latest Vagrant release under Windows 10 64 bit. ubuntu/trusty64 worling just fine...
Bringing machine 'default' up with 'virtualbox' provider...
==> default: Box 'ubuntu/xenial64' could not be found. Attempting to find and install...
default: Box Provider: virtualbox
default: Box Version: >= 0
==> default: Loading metadata for box 'ubuntu/xenial64'
==> default: Adding box 'ubuntu/xenial64' (v20161013.1.0) for provider: virtualbox
default: Progress: 100% (Rate: 1167k/s, Estimated time remaining: --:--:--)
The box failed to unpackage properly. Please verify that the box
file you're trying to add is not corrupted and try again. The
output from attempting to unpackage (if any):
x box.ovf
x Vagrantfile
x metadata.json
x ubuntu-xenial-16.04-cloudimg.mf
x ubuntu-xenial-16.04-cloudimg.vmdk: Truncated tar archive
bsdtar.EXE: Error exit delayed from previous errors.
I have tried two different internet providers on two differents laptops, reinstalled Vagrant, cleaned temp -- nothing helps. box dir under user profile is empty