I recently installed Ubuntu in dual boot along with Windows 10 on an HP laptop. Initially I was unable to boot up Windows using grub as selecting the Windows options would just loop back to grub.
Then I performed a boot repair, and all these extra options showed up in the grub menu.
I'm able to open up Windows using "Windows UEFI bootmgfw.efi" option, but not using the standard option of "Windows Boot Manager (on /dev/sda1).
How do I reduce these entries and why can't I boot Windows using the latter option?
Here's an image of grub. The first option is Ubuntu: