After some hours, I figured out that Vagrant can't unpackage boxes to VAGRANT_HOME when Windows (7) username has special characters like "é". Debugging, I've seen that if username is Pelé, for example, Vagrant attempts move the file to something like C:/Users/Pel\0xE9/.vagrant.d/tmp, causing a "failed writing body" error.
I know that a username like that is weird and I still can set another value to VAGRANT_HOME, but seems like a little bug to me.
After some hours, I figured out that Vagrant can't unpackage boxes to VAGRANT_HOME when Windows (7) username has special characters like "é". Debugging, I've seen that if username is Pelé, for example, Vagrant attempts move the file to something like C:/Users/Pel\0xE9/.vagrant.d/tmp, causing a "failed writing body" error.
I know that a username like that is weird and I still can set another value to VAGRANT_HOME, but seems like a little bug to me.