A bootable USB flash drive can setup a virtual machine on top of the host computer. On the virtual machine, a user may be able to access the files and data on the host computer. This is a convenient...

A bootable USB flash drive can setup a virtual machine on top of the host computer. On the virtual machine, a user may be able to access the files and data on the host computer. This is a convenient feather but sometimes it may cause threats to the security. Describe how to effectively address this problem?