Noob question

[BazookaBZ]

So yesterday i came across the problem where i deleted my 50GB partition that was reserved for Linux. I was thinking at the time i should reverse the boot loader over at the Ubuntu terminal, because the way i got into Ubuntu first time about a week ago is if i setup the bootloader to launch grub via command from Windows CMD, and it actually took me to the GRUB Screen so i was able to launch linux from that, but long story short i didn't think of reversing that in the terminal and after deleting the Linux partition in windows and restarted(WHICH I WAS SO STUPID, i knew the consequences was coming to me), i messed up my EFI boot loader and i couldn't get into windows anymore, and i tried every single Boot rec and BCD command out there on the forums of different variety websites. So how can i avoid screw ups like this is in the future so i don't have to reinstall windows cleanly on my SSD? And Also, the Linux partition was separate from 1TBB HDD, so it wasn't even near my SSD windows installation at all, but i still had to reinstall windows and i couldn't really successfully fix the windows boot loader.

[kirashi]

12 minutes ago, BazookaBZ said:

So how can i avoid screw ups like this is in the future so i don't have to reinstall windows cleanly on my SSD?

First of all, adding some paragraph breaks would make your post more readable, but anywho... I simply unplug all other HDD's from my system except for the one I'm installing my OS onto, whether that be Windows, Linux, or MacOS. Why? Because I can't trust that an OS installer isn't going to screw with other drives on my system, so the easiest thing is to simply remove them from the equation.

 

This has happened to me numerous times over the years, from having Windows Vista & 7 installers tell me they'll install Windows onto my SSD, only to somehow put the bootloader onto my HDD (because that makes sense... said no one ever) to having GRUB overwrite the MBR partition table on the wrong disk because of a programmatical numbering issue with how this particular distribution of Linux decided to count /dev/sdaX disks.

 

Never again; when installing an OS, I unplug ALL drives except the drive I'm willing to risk losing all data on.

[BazookaBZ]

I did what you suggested and linux still overwrited my windows boot loader. I unplugged all the HDs and installed linux on a 250GB hdd and after it was installed plugged everything back in and the GRUB console appeared.