Securing the virtual machines 179 Table 9.2 Default Permissions on the Default Folder for the VHD Files Location Configuration location Account Administrators System VM hard disks location Administrators System Creator owner NTFS rights Full control Full control Full control Full control Full control Apply to This folder, subfolders, and files This folder, subfolders, and files This folder, subfolders, and files This folder, subfolders, and files Subfolders and files only Bitlocker drive encryption Windows Encrypted File System, or EFS, was a popular method in previ- ous Microsoft virtualization strategies for encrypting the virtual drive files.