Keys under Windows can be remapped in the registry. There is a GUI tool that can do it -. There is an of mapping CMD to Ctrl in BootCamp using this tool. I've also used the some time ago to build layouts for my Windows VMs that match the OS X layouts.
One nice thing of MSKLC is that it creates installable layout packages that add to the system layouts (i.e. Parallels for mac os high sierra. It doesn't hack on an existing layout) and you can activate those new layouts in the usual place in Control Panel. If I recall correctly, it can only remap usual keys (i.e. No Ctrl/Alt/Win remapping), but I may be wrong and it might still be worth to give it a try.
If you're using a Windows keyboard on your Mac, you can remap the modifier key locations to make your life easier. Read more at 9to5Mac: http://9to5mac.com/2016/03/17. Here is how to remap cut/copy/paste so they’re the same on both platforms. One of the hardest things to get used to when we go from Mac to Windows, or Windows to Mac is cut/copy/paste. On a Mac, this is accomplished using the “Command +” combination, while on Windows it’s done through “Control +”.