Unable to boot back to windows and error while installing Manjaro

Getting this error while installing Manjaro in dual boot.

The installer failed to create partition on disk ‘ST1000LM035-1RK172’
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Create a new partition (512.00 MiB, fat32) on ‘/dev/sda’
=======================================
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Job: Create new partition on device ‘/dev/sda’
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Failed to add partition ‘New Partition’ to device ‘/dev/sda’

I’m installing Manjaro on a separate drive from where my windows is installed, but a guy on reddit said that I’ll have to shrink the windows volume and install it their.
So now the problem is I can’t move back to windows, whenever opening the PC, I’m simply getting the Manjaro boot menu, which asks to install as ‘Open Source’ or ‘Proprietary’ software and other options. I tried going to BIOS setup but apparently, unable to enable the secure boot option as well.

Any help on this? Can I solve this error from Manjaro interface or if not, how do I move back to windows?

Specifications:
RAM: 4GB
Processor: Intel i3, 2GHZ
Manjaro XFCE, Qonos 21.2.2

Images:
The partition I proceeded with: https://i.imgur.com/9ggTH6w.jpg
The BIOS settings, unable to enable Secure Boot: https://i.imgur.com/1te4sDx.jpg
Also when I remove my USB and restart my PC, I get this screen saying ‘No bootable device’: https://i.imgur.com/L6QBXu2.jpg

Read those, I hope it helps you:

https://wiki.manjaro.org/index.php?title=GRUB/Restore_the_GRUB_Bootloader

Try uploading images using imgur

Hi @ineedserioushelp, and welcome!

  1. Please see [HowTo] post screenshots and links with regards to thee images.
  2. That screen where you have to select between open-source and proprietary drivers is the boot ISO environments. So it doesn’t start from the HDD/SSD, it tries to start the ISO environment, which is usually a USB thumb drive lately.

Further, please see [HowTo] Provide System Information.

Thanks! Here are the images:
The partition I proceeded with: https://i.imgur.com/9ggTH6w.jpg
The BIOS settings, unable to enable Secure Boot: https://i.imgur.com/1te4sDx.jpg
Also when I remove my USB and restart my PC, I get this screen saying ‘No bootable device’: https://i.imgur.com/L6QBXu2.jpg

see this

before installing
ALWAYS recheck options in UEFI

secure boot off
fast boot off
csm off
legacy off
drivers on AHCI ( not raid )
no optane RST

it easy to check before installing from USB live manjaro
open a terminal

inxi  -Fxza
test -d /sys/firmware/efi && echo efi || echo bios
sudo efibootmgr -v
sudo parted -l 

if you get MBR instead of UEFI that you have not checked BEFORE installing

I’ve disabled secure boot, fast boot, legacy. Can’t find the AHCI and Optane RST option in the BIOS settings tho.
While running the above command, I do get

scheme: MBR

The second commands echos BIOS and the last one prints out these values:

BootCurrent: 0002
Timeout: 0 seconds
BootOrder: 2001,2002,2004
Boot0002* USB Hard Drive (UEFI) - SanDisk (SanDisk)
Boot2001* EFI USB Device
Boot2002* EFI DVD/CDROM

TBH, I don’t exactly know what most of these mean, I’m a complete newbie to this.

But I haven’t installed Manjaro yet (or can’t for now…), so I’m unable to use most of the commands listed there, also I can’t install refind, it says

error: target not found: refind-efi

BootCurrent: 0002
Timeout: 0 seconds
BootOrder: 2001,2002,2004
Boot0002* USB Hard Drive (UEFI) - SanDisk (SanDisk)
Boot2001* EFI USB Device
Boot2002* EFI DVD/CDROM

I don’t exactly know what most of these mean

There is no boot entry for Windows, it means grub wont show up a windows entry to boot in.

Try this (from a live usb):

sudo update-grub

And then see if something change in:

efibootmgr -v