A system and method for updating an offline virtual machine are disclosed. The method comprises mounting an image of an offline virtual machine on a host operating system. The method further comprises generating drive-mapping information for the mounted virtual machine image and loading registry information of the mounted virtual machine image onto the host operating system using the drive-mapping information. An update to be applied to the offline virtual machine is determined based on the registry information and a patch bundle is retrieved based on the determination, wherein the patch bundle comprises registry update instructions, file system update instructions, and a patch file. The patch bundle is executed on the host operating system to update the offline virtual machine.