GRUB rescue problem after deleting Ubuntu partition! [duplicate]

Try the following ..

grub rescue > ls
(hd0) (hd0,msdos5) (hd0,msdos3) (hd0,msdos2) (hd0,msdos1) (hd1) (hd1,msdos1)
grub rescue > ls (hd0,msdos1) # try to recognize which partition is this
grub rescue > ls (hd0,msdos2) # let's assume this is the linux partition
grub rescue > set root=(hd0,msdos2)
grub rescue > set prefix=(hd0,msdos2)/boot/grub # or wherever grub is installed
grub rescue > insmod normal # if this produced an error, reset root and prefix to something else ..
grub rescue > normal

For a permanent fix run the following after you successfully boot:

sudo update-grub
sudo grub-install /dev/sdX

where /dev/sdX is your boot drive.

To remove GRUB just download Windows 8 or 10 from another PC. Burn the iso into the USB with Rufus. Boot from USB, click Troubleshooting, then Command Prompt, and type:

Bootrec /fixmbr  

Windows will start normally without Ubuntu's GRUB. You can reinstall Ubuntu again.

Boot your computer on a Ubuntu live-CD or live-USB

then follow the section 2nd option : install Boot-Repair in Ubuntu from this link:

https://help.ubuntu.com/community/Boot-Repair