1. In a computing system environment, a method of providing computing backup to a plurality of virtual machines configured on a hardware platform, each said virtual machine having an operating system, comprising: upon indication of undertaking a backup operation for one of the virtual machines, determining a type of said operating system for said one virtual machine; selecting a virtual machine proxy having an operating system most closely approximating said type of said operating system for said one virtual machine; and enabling said backup operation through use of the selected virtual machine proxy.