few days ago I tried to install ubuntu in my legacy bios laptop. but I failed to install. then I saw a youtube video and had installed successfully ubuntu only after deleting EFI folder from LiveUsb. But after completing the installation of ubuntu, my windows 10 is not booting. In the grub menu two option of win10 are showing, i.e 1) de/sda1 2) dev/sdb2 . When I click each of them, they just turn into a black screen. sometimes it shows "pc need to be repaired" .I tried a lot to fix this problem, i watched lots of youtube video and read article and followed those procedure but not a single one is working.I used boot repair tool,grub customizer tool, even i reinstalled the ubuntu, but till now iam unable to boot my win10. I used liveusb for going to win10 "repair my computer option" , even win10 is not booting from live usb. when i click on "usb storage device" in bios setup, it just turns into a black screen.it doesn't boot into win10. although when i use ubuntu liveusb,it works smoothly.my windows system is installed in ssd, and I have a backup recovery image in my disk.ubuntu was installed in dual storage i.e root and swap in ssd partitions and home in hdd partition.its hurry to recover my win10. please someone help me.its hurry.If there are no way to boot, then please tell me how to uninstall win10 and restore from my backed up recovery img or how to install again alongside ubuntu. I consent to delete my windows10, but i don't want to loss my data that are saved in separate partition of hard disk
