Windows 10。
运行vagrant up时，出现以下错误：
==> centos: Destroying VM and associated drives...
C:/Users/hi/.vagrant.d/gems/2.2.5/gems/daemons-1.2.4/lib/daemons/daemonize.rb:10:in `fork': fork() function is unimplemented on this machine (NotImplementedError)
from C:/Users/hi/.vagrant.d/gems/2.2.5/gems/daemons-1.2.4/lib/daemons/daemonize.rb:10:in `safefork'
from C:/Users/hi/.vagrant.d/gems/2.2.5/gems/daemons-1.2.4/lib/daemons/daemonize.rb:45:in `call_as_daemon'
from C:/Users/hi/.vagrant.d/gems/2.2.5/gems/daemons-1.2.4/lib/daemons/application.rb:270:in `start_proc'
from C:/Users/hi/.vagrant.d/gems/2.2.5/gems/daemons-1.2.4/lib/daemons/application.rb:296:in `start'
from C:/Users/hi/.vagrant.d/gems/2.2.5/gems/daemons-1.2.4/lib/daemons/controller.rb:56:in `run'
from C:/Users/hi/.vagrant.d/gems/2.2.5/gems/daemons-1.2.4/lib/daemons.rb:197:in `block in run_proc'
from C:/Users/hi/.vagrant.d/gems/2.2.5/gems/daemons-1.2.4/lib/daemons/cmdline.rb:92:in `call'
from C:/Users/hi/.vagrant.d/gems/2.2.5/gems/daemons-1.2.4/lib/daemons/cmdline.rb:92:in `catch_exceptions'
from C:/Users/hi/.vagrant.d/gems/2.2.5/gems/daemons-1.2.4/lib/daemons.rb:196:in `run_proc'
from C:/Users/hi/.vagrant.d/gems/2.2.5/gems/vagrant-dns-1.1.0/lib/vagrant-dns/service.rb:26:in `run!'
from C:/Users/hi/.vagrant.d/gems/2.2.5/gems/vagrant-dns-1.1.0/lib/vagrant-dns/service.rb:17:in `start!'
from C:/Users/hi/.vagrant.d/gems/2.2.5/gems/vagrant-dns-1.1.0/lib/vagrant-dns/service.rb:52:in `restart!'
from C:/Users/hi/.vagrant.d/gems/2.2.5/gems/vagrant-dns-1.1.0/lib/vagrant-dns/restart_middleware.rb:14:in `call'
from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.2/lib/vagrant/action/warden.rb:34:in `call'
from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.2/lib/vagrant/action/warden.rb:95:in `block in finalize_action'
from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.2/lib/vagrant/action/warden.rb:34:in `call'
from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.2/lib/vagrant/action/warden.rb:34:in `call'
from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.2/lib/vagrant/action/warden.rb:95:in `block in finalize_action'
from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.2/lib/vagrant/action/warden.rb:34:in `call'
from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.2/lib/vagrant/action/warden.rb:34:in `call'
from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.2/lib/vagrant/action/warden.rb:95:in `block in finalize_action'
from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.2/lib/vagrant/action/warden.rb:34:in `call'
from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.2/lib/vagrant/action/warden.rb:34:in `call'
from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.2/plugins/providers/virtualbox/action/check_guest_additions.rb:49:in `call'
from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.2/lib/vagrant/action/warden.rb:34:in `call'
from C:/Users/hi/.vagrant.d/gems/2.2.5/gems/vagrant-vbguest-0.13.0/lib/vagrant-vbguest/middleware.rb:31:in `call'
from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.2/lib/vagrant/action/warden.rb:34:in `call'
from C:/Users/hi/.vagrant.d/gems/2.2.5/gems/vagrant-proxyconf-1.5.2/lib/vagrant-proxyconf/action/only_once.rb:33:in `call'
from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.2/lib/vagrant/action/warden.rb:34:in `call'
from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.2/plugins/providers/virtualbox/action/customize.rb:40:in `call'
from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.2/lib/vagrant/action/warden.rb:34:in `call'
from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.2/lib/vagrant/action/builtin/wait_for_communicator.rb:71:in `call'
from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.2/lib/vagrant/action/warden.rb:34:in `call'
from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.2/plugins/providers/virtualbox/action/customize.rb:40:in `call'
我试图从GitHub问题中找到一些解决方案： https://github.com/vagrant-landrush/landrush/issues/16
不知道。
还尝试安装：
gem install win32-process
同样的结果。
所以我不知道真正的问题。