Is there something wrong with my partitioning? this is on live usb, cant find linux insallation from BIOS. EXT4 partition is obv where my install is. Grub menu is also gone so i cant boot into linux. 
#linux #tech #foss #dualboot #windows
Discussion
Several years ago I was running a dual boot and after updating Windows I was unable to boot into Linux. It wiped out my entire Grub menu and totally took over. That was the day I shitcanned Windows and never looked back.
Microsoft is known for doing this.
any tips how do i do it? i need to wipe win partition but the linux side is unaccessable
Not really, once I experienced Microsoft Windows doing a dick move like that I just wiped the drive and installed Linux.
Might be able to boot into a live version (USB) of a distro if you need to access the partition. At least that way you are using something that can read the file system.
this article might be a good start:
https://www.maketecheasier.com/restore-grub-2-as-the-main-bootloader