I was trying to install Ubuntu 18.04 parallel to Windows 10. I was unable to find any of the partions while installing ubuntu and I came across this answer. I tried the steps mentioned by Walid Ammou. I then wanted to make sure nothing went wrong so I quit the ubuntu installation without installing and rebooted my system but I am not able to boot into Windows. I get a message saying default boot device missing or boot failed. My hard drive doesn't seem to be in the boot menu.
I will appreciate any help!
EDIT:
This is the output of sudo parted -l
EDIT2
This is the output of sudo fdisk -l /dev/sda
EDIT 3:
This is the output of gdsik]