Solution: Vagrant stopped working - `open': Access is denied. (5) (ChildProcess::Error)

ERROR from CMD with out running vagrant up as administrator

There was an error while executing `VBoxManage`, a CLI used by Vagrant
for controlling VirtualBox. The command and stderr is shown below.

Command: ["showvminfo", "18021ea0-83ee-43c3-9adb-26ad7eb0c6ca"]

Stderr: VBoxManage.exe: error: Failed to create the VirtualBox object!
VBoxManage.exe: error: Code CO_E_SERVER_EXEC_FAILURE (0x80080005) - Server execu
tion failed (extended info not available)
VBoxManage.exe: error: Most likely, the VirtualBox COM server is not running or
failed to start.

Error on running vagrant up as administrator from CMD

C:/HashiCorp/Vagrant/embedded/gems/gems/childprocess-0.5.9/lib/childprocess/wind
ows/handle.rb:12:in `open': Access is denied. (5) (ChildProcess::Error)
        from C:/HashiCorp/Vagrant/embedded/gems/gems/childprocess-0.5.9/lib/chil
dprocess/windows/process.rb:70:in `launch_process'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/childprocess-0.5.9/lib/chil
dprocess/abstract_process.rb:82:in `start'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/u
til/subprocess.rb:122:in `block in execute'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/u
til/safe_chdir.rb:26:in `block (2 levels) in safe_chdir'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/u
til/safe_chdir.rb:25:in `chdir'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/u
til/safe_chdir.rb:25:in `block in safe_chdir'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/u
til/safe_chdir.rb:24:in `synchronize'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/u
til/safe_chdir.rb:24:in `safe_chdir'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/u
til/subprocess.rb:121:in `execute'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/u
til/subprocess.rb:22:in `execute'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/u
til/platform.rb:129:in `cygwin_windows_path'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.8.5/plugins/provi
ders/virtualbox/driver/base.rb:50:in `block in initialize'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.8.5/plugins/provi
ders/virtualbox/driver/base.rb:42:in `each'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.8.5/plugins/provi
ders/virtualbox/driver/base.rb:42:in `initialize'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.8.5/plugins/provi
ders/virtualbox/driver/meta.rb:36:in `initialize'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.8.5/plugins/provi
ders/virtualbox/provider.rb:20:in `new'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.8.5/plugins/provi
ders/virtualbox/provider.rb:20:in `usable?'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/v
agrantfile.rb:138:in `machine_config'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/v
agrantfile.rb:45:in `machine'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/e
nvironment.rb:663:in `machine'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/p
lugin/v2/command.rb:177:in `block in with_target_vms'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/p
lugin/v2/command.rb:201:in `call'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/p
lugin/v2/command.rb:201:in `block in with_target_vms'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/p
lugin/v2/command.rb:183:in `each'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/p
lugin/v2/command.rb:183:in `with_target_vms'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.8.5/plugins/comma
nds/up/command.rb:131:in `install_providers'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.8.5/plugins/comma
nds/up/command.rb:85:in `execute'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/c
li.rb:42:in `execute'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.8.5/lib/vagrant/e
nvironment.rb:302:in `cli'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.8.5/bin/vagrant:1
74:in `<main>'

Similar issue on Question from Stack Overflow

Fix steps for my machine-

1. Installed fresh - Vagrant (1.8.5)
2. Installed fresh Virtual box VirtualBox 5.1.4 for Windows host x86/amd64 - Version 5.1.4 r110228 (Qt5.5.1) 
3. Install Git bash version 2.8.2.windows.1 (64 bit)
4. Running Git bash as admin and calling vagrant up through that elevated console

Solution-
https://laracasts.com/discuss/channels/servers/vagrant-up-failing-trying-to-add-to-hosts

New vagrant/Virtual box compatibility for my windows 7 machine (Just for reference)
- Vagrant 1.8.1 
- Virtualbox Version 5.0.10 r104061

Vagrant