I was using Kali live until yesterday. But because of some wifi net. Issues i tried to install it. While installing i got a error in "net configure" step. Then i skipped to 'disk mngr" step. I have already unallocated(from live gparted) 10gb.
I selected guided largest free space . But next step showed entire disk. Although i continued. Installation success.
Grub loaded and both windows & kali loaders had. Kali was selected but not booted ,black screen , 3acpi errors.,(installed from live iso, live stick worked fine).

Then booted windows 10 ,fortunately it has protected still. Opened Diskmgmt.msc ,but no more kali partition. 10gb still unallocated.

Thats yesterday. Today when i turn on lap,
No more grub loaded , windows 10 automatically booted. Windows still worked fine for my fortunate.
In f9 boot menu Kali uefi shows.

My expectations:
1) remove kali linux and grub(note that cannot found kali partition ).
2) or reinstall kali.
3) if uninstalled ,how to replace win boot loader without cd(*optional)

So, what to do??????