Fix partition issues relatively safely with P2V and V2P

I foolishly decided to convert a Windows operating system drive from MBR partitioned to GPT partitioned. That conversion didn't go right. The boot portion of the drive was erased or destroyed. The partitions were still there and no data was destroyed. I tried to convert the drive back to MBR. That didn't work easier. This is usually the point where you might start panicking. The cycle time is pretty long when you try and fix the boot portion of a physical disk. There are continual physical machine restarts. There is also risk that data will be lost while attempting to fix this. I wanted to attempt drive repair without risking destruction of data on the drive I was working on. In addition, I didn't want to work on this drive without access to the internet. My target laptop laptop has two bootable drives in it. I realized that I could convert the trashed disk from Physical to Virtual using Paragon Drive Copy. Then I could hack on the virtual drive...