windows install keeps restarting into bios then login screen

Understanding and Resolving Persistent Windows Installation Issues: A Step-by-Step Guide

Introduction

Encountering persistent issues during a Windows installation can be incredibly frustrating, especially when the system continually restarts into BIOS or the existing operating system instead of completing a fresh setup. This guide aims to diagnose common causes and provide actionable solutions to help you successfully reinstall Windows 10 on your PC.

Identifying the Problem

Several users experience symptoms such as:

• The Windows installer restarting into BIOS mode repeatedly
• Inability to complete the Windows setup process
• System reverting to previous state after each reboot
• Errors during ISO creation or installation steps
• System instability and file revert issues post-deletion

These symptoms often point to underlying hardware or configuration issues that prevent a clean installation.

Pre-Installation Troubleshooting

1. Verify BIOS Settings Correctly Configured

Ensure your BIOS is set up for a smooth UEFI Windows installation:

• Disable Compatibility Support Module (CSM)
• Enable UEFI Boot Mode Only
• Disable Secure Boot
• Set USB as Boot Priority

After adjusting these settings, save changes and restart your PC.

1. Prepare a Reliable Bootable USB

Create a new Windows installation media using tools like Rufus or the official Media Creation Tool, ensuring:

• The ISO image is downloaded directly from Microsoft’s website
• The USB drive is properly formatted using Diskpart or disk management tools

• The USB is set to GPT partition scheme for UEFI mode

• Remove Existing Partitions During Installation

When installing Windows:

• Delete all existing partitions on the target drive
• Select the unallocated space for installation

• Allow Windows to create necessary partitions automatically

• Confirm Hardware Compatibility and Integrity

Persistent reboots may stem from hardware issues:

• Run diagnostics on RAM, SSD/HDD, and motherboard
• Disconnect any non-essential peripherals
• Ensure your storage device is healthy and properly connected

Advanced Troubleshooting

If standard procedures fail, consider the following steps:

1. Check for Firmware Updates

Update your motherboard BIOS to the latest version to improve hardware compatibility and resolve bugs.

1. Disable Overclocking and Reset BIOS Defaults

Overclocked components or custom BIOS settings can interfere with installations. Reset BIOS to default settings.

1. Use Alternative Installation Methods

2. Try installing Windows on a different USB port (preferably USB 3.0 or USB-C)

3. Utilize a different USB drive if possible
4. Mount the ISO directly via a recovery environment and run setup.exe from there