Do you know that Windows 7 is installed from under the PE version itself (minwin), and already at the installation stage it can run almost any software:

There really is almost a full-fledged Windows, naturally without a shell explorer (which does not interfere with running something else, such as TC, as in my case). Naturally, no multimedia and Internet, but, surprisingly, some of the specific functions of Win 7 work there - for example, docking windows when dragging.
What is the coolest is that all the drives (including USB) are perfectly visible. Those. The Win 7 installation disk can also be used as a recovery disk, in case something died, you didn’t have time to save up, as always, but there is no normal PE boot disk.
Another positive point is that you can monitor the process of copying Win 7 files in real time.
Actually, to take advantage of all this, in the first stages of the installation you need to press Shift + F10, a full-fledged console will appear, from which everything else starts.