I deleted my ubuntu partition from my windows, and when I turn the pc on, it shows up the grub terminal with a black background.
I need help, I need to install linux again too.

Try getting into the bios/uefi and changing the boot order to boot into windows again

@nicogramm That will likely not help. Pretty sure that he needs to restore MBR on his drive to what Windows needs. Just google "windows fix mbr". But if he wants Linux back, then just install it again and reinstall grub.

Google how to properly uninstall Ubuntu. Happened to me 2 or 3 times..

Get a windows recovery disk and boot from it. Run startup repair , it will detect os and will rebuild MBR. Or from same disk run cmd and rebuild BCD and MBR manually. Google rebuild bcd

Trying to boot a usb drive form grub terminal and i'm getting this

@leksyib for recovery disk you do not need to go into grub terminal, you need to set USB device to highest in boot order or choose USB stick from temporary boot selection, press f12 for boot selection when system is on manufacturer logo. If it does not work google boot selection key for your laptop

@amrit2022 I didn't go to the grub terminal. It comes immediately i turn the laptop on