I have been learning about what is called "Native Boot" and VHDs. For those of you who may not know, a VHD is a virtual hard drive that windows 7 can use natively. Pretty simple. You create the virtual drive, which is just a file. You mount it and activate it. It become another drive letter, much like a mapped drive. A VHD can hold an OS. You can use them in different virtual machine softwares. You can use them as image backups and restore from them. You can extract the contents. And, you can boot into them. I am messing with the ability to make my OS on drive c: into a VHD, and then boot that VHD from the boot menu. It seems to be difficult to do. To use native booting, what many are doing is to create a virtual drive, then install the OS onto that drive, then boot into it. That seems to work from all I have read, or at least there are lots of success stories. I don't really want to do that, although I know that I could. Instead, I am seeking to take my already installed and configured OS, make a VHD of it, then boot into that. In this manner, I could have a "sandbox" environment to test in or whatever, and it does not effect my normal OS drive. Does anyone have any info to share on this topic? I think it would be a marvelous way to go about things - make a VHD of your drive, fix it so it can be booted, then use it and throw it away after you are done. Sul.