can't run vagrant for laravel homestead

i want to use laravel/homestead. i do all steps one by one according to below url https://medium.com/@eaimanshoshi/i-am-going-to-write-down-step-by-step-procedure-to-setup-homestead-for-laravel-5-2-17491a423aa

but when i send this command -> 'vagrant up' i get these warnings and errors

C:/HashiCorp/Vagrant/embedded/mingw64/lib/ruby/2.4.0/win32/registry.rb:68: warning: already initialized constant Win32::WCHAR C:/HashiCorp/Vagrant/embedded/mingw64/lib/ruby/2.4.0/win32/registry.rb:68: warning: previous definition of WCHAR was here C:/HashiCorp/Vagrant/embedded/mingw64/lib/ruby/2.4.0/win32/registry.rb:69: warning: already initialized constant Win32::WCHAR_NUL C:/HashiCorp/Vagrant/embedded/mingw64/lib/ruby/2.4.0/win32/registry.rb:69: warning: previous definition of WCHAR_NUL was here C:/HashiCorp/Vagrant/embedded/mingw64/lib/ruby/2.4.0/win32/registry.rb:70: warning: already initialized constant Win32::WCHAR_CR C:/HashiCorp/Vagrant/embedded/mingw64/lib/ruby/2.4.0/win32/registry.rb:70: warning: previous definition of WCHAR_CR was here C:/HashiCorp/Vagrant/embedded/mingw64/lib/ruby/2.4.0/win32/registry.rb:71: warning: already initialized constant Win32::WCHAR_SIZE C:/HashiCorp/Vagrant/embedded/mingw64/lib/ruby/2.4.0/win32/registry.rb:71: warning: previous definition of WCHAR_SIZE was here C:/HashiCorp/Vagrant/embedded/mingw64/lib/ruby/2.4.0/win32/registry.rb:72:in `find': unknown encoding name - CP720 (ArgumentError)

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