title: Unable to start boot2docker in Windows7
body: <p>I just installed boot2docker in Windows 7 but nothing happened! The first time was using the Boot2Docker start icon - it did the initializing part and then the window just closed. Then to investigate further I tried the <code>boot2docker -v up</code> command and the result is listed below.</p>
  
  <pre><code>C:\Program Files&gt;boot2docker -v up
  Boot2Docker-cli version: v1.6.0
  Git commit: 9894ae9
  
  2015/04/28 00:08:45 executing: C:\Program Files\Oracle\VirtualBox\VBoxManage.exe
   showvminfo boot2docker-vm --machinereadable
  
  2015/04/28 00:08:46 executing: C:\Program Files\Oracle\VirtualBox\VBoxManage.exe
   guestproperty set boot2docker-vm /VirtualBox/GuestAdd/SharedFolders/MountPrefix
   /
  
  2015/04/28 00:08:46 executing: C:\Program Files\Oracle\VirtualBox\VBoxManage.exe
   guestproperty set boot2docker-vm /VirtualBox/GuestAdd/SharedFolders/MountDir /
  
  2015/04/28 00:08:46 executing: C:\Program Files\Oracle\VirtualBox\VBoxManage.exe
   sharedfolder add boot2docker-vm --name c/Users --hostpath C:\Users --automount
  VBoxManage.exe: error: Shared folder named 'c/Users' already exists
  
  VBoxManage.exe: error: Details: code VBOX_E_OBJECT_IN_USE (0x80bb000c), componen
  t SessionMachine, interface IMachine, callee IUnknown
  
  VBoxManage.exe: error: Context: "CreateSharedFolder(Bstr(name).raw(), Bstr(hostp
  ath).raw(), fWritable, fAutoMount)" at line 1008 of file VBoxManageMisc.cpp
  
  2015/04/28 00:08:46 executing: C:\Program Files\Oracle\VirtualBox\VBoxManage.exe
   setextradata boot2docker-vm VBoxInternal2/SharedFoldersEnableSymlinksCreate/c/U
  sers 1
  
  2015/04/28 00:08:46 executing: C:\Program Files\Oracle\VirtualBox\VBoxManage.exe
   startvm boot2docker-vm --type headless
  
  Waiting for VM "boot2docker-vm" to power on...
  VM "boot2docker-vm" has been successfully started.
  
  error in run: Failed to start machine "boot2docker-vm": exit status 1
  </code></pre>
  
  <p>What does this mean? I did an uninstall and reinstall and removed the boot2docker-vm and ran the <code>boot2docker init</code> and <code>boot2docker start</code> from the command prompt during the second attempt but same result.</p>