Virtualbox Tips for Ubuntu Guest

It can help solve the error symlinks!

How to Get Shared Folder Write Access

replace username with your actual ubuntu username
$ sudo usermod -a -G vboxsf username
C:\WINDOWS\system32>VBoxManage setextradata VM_name
VBoxInternal2/SharedFoldersEnableSymlinksCreate/shared_folder 1

If you have not added virtualbox commands to your path, either do so or run VBoxManage from the folder where it is located. Replace VM_name with the name of the virtual machine,
Note that you still need to run the VirtualBox Manager as an administrator from Windows in order for the creation of virtualenv (symlinks) to work properly.