Dualboot windows and ubuntu, where to install bootloader
Solution 1:
Boot loader will be installed during Ubuntu installation. I sugest install boot loader (Grub) to MBR of hardrive where Windows is installed. If you are using EFI system partion, also use the same hard drive. You can turn off the Security Boot in BIOS before start Ubuntu installation. Some third-party drivers (e.g. wifi) can be not installed properly. Grub boot menu will be created automatically. Good luck.