Question about dual-booting 13.04 and Windows 8/8.1

Question about dual-booting 13.04 and Windows 8/8.1

So, after learning that in order to boot into Ubuntu from a usb drive, I
had to go into my bios and change the boot setting from UEFI to Legacy, I
managed to install Ubuntu 13.04. Now, when I restart my laptop, it pops up
the GRUB menu thing, and I can load Ubuntu no problem. But if I try to
select Windows, I get an error saying windows can't be booted, and I need
the recovery disc to repair this. but, since I don't have one, I thought
it'd be a good idea to look around the boot settings again. Changing the
boot settings from Legacy back to UEFI lets me boot into windows normally,
but there is no option to get into Ubuntu unless I change it back to
Legacy, which locks me out of Windows again. My question is, how can I
make these options bot available to me without having to mash f2 to get
into the bios every time I want to change my OS? Thank you in advance.