Note to self: Never use Easeus Partition Manager to resize the Windows partition.
It totally borked the boot record, beyond the point of repair tools. Even manual recovery commands failed.
Wiping and starting over. I was due for that anyway. 
Get bent, Cortana.
Back up and running, basic apps all loaded and working. Yay, backups!
@voltronic in the days of NVMe's I just swap disks if I need another OS, it is the only sane way.
@matuzalem
What do you do, clone everything through a second NVMe?
Otherwise I'd think you're still reinstalling apps and such.
@voltronic clone would be the way but don't ask me how to do so from Windoze );
@matuzalem
Macrium Reflect is what I've used in the past. Clonezilla is also great, which is the modern equivalent of the old Norton Ghost that I used often in my PC repair shop days.
@voltronic norton was the last thing I used to clone windows on PC then I managed a dual boot (windows/mac) lab with Deploy Studio (and Munki) those where the days!
So sorry...I'm still struggling with the consequences of having to wipe and start over 2 weeks ago, after I tried to run my windows in a mode that could handle earlier version software.
Won't ever try THAT again!
I feel your pain.
@voltronic
Well that had to suck. I've been there (forget the product I had used then... so long ago.
Fortunately, I have everything on separate partitions/disks so while I have to reinstall the OS and all of my apps, I have all of my data intact because of daily backups.