I uninstalled Ubuntu by deleting the drive allotted for it from Windows Disk Management, but I guess I didn't delete grub. I ve tried several videos, but none of them worked for me.
Windows Boot Manager
Windows failed to start. A recent hardware or software change might be the cause. To fix the problem: 1. Insert your Windows installation disc and restart your computer. 2. Choose your language settings, and then click "Next." 3. Click "repair your computer." If you don't have this disc, contact your system administrator or computer manufacturer for assistance. File: \BCD (not \boot\BCD) Status: 0xc0000098
Now I get Ubuntu and Windows option when I press F9 at starting, but choosing Windows will will give the above error message and choosing Ubuntu will take me to grub command window.