How to Dual Boot Linux and Windows 11 (Step-by-Step Guide)
What Is Dual Boot
Dual boot means installing two operating systems on the same PC and choosing which one to boot each time you turn on the computer. It’s the most comfortable way to use Linux without giving up Windows.
Prerequisites (IMPORTANT: Read Before Starting)
- Backup: back up all your important data before modifying partitions
- Disk space: minimum 25 GB free for Linux, 50 GB+ recommended
- USB of at least 8 GB to create the installation USB
Step 1: Create the Installation USB
- Download the ISO from your distribution’s website
- Download Rufus (rufus.ie) — the simplest tool for creating bootable USB in Windows
- Open Rufus, select the USB, select the ISO, keep default settings, and click Start
- The process takes 5-10 minutes
Step 2: Shrink the Windows Partition
- Press Win, type Disk Management and open it
- Right-click the Windows partition (C:) → Shrink Volume
- Enter the space to shrink in MB (e.g., 51200 for 50 GB) and confirm
- You’ll see ‘Unallocated’ space — the Linux installer will use it
Step 3: Install Linux
- Restart with USB inserted — press F12 (or F2, Esc depending on manufacturer) to enter boot menu
- In the installer, choose Install alongside Windows
- Follow the wizard: language, keyboard, timezone, create user and password
- When done, the installer configures GRUB automatically
On restart, you’ll see the GRUB menu with options to choose between Windows and Linux.
Can I access my Windows files from Linux?
Yes, Linux can read Windows NTFS partitions. Your Windows files are accessible from Linux’s file manager.
Does dual boot affect Windows performance?
No. Each system is on its own partition and they don’t interfere. The only change is seeing the GRUB menu for a few seconds at boot.
What if Windows disappears from the GRUB menu after an update?
Windows updates sometimes overwrite the bootloader. Solution: boot from the Linux USB, use the Boot-Repair tool to restore GRUB.
Conclusion
Dual boot is simpler than it looks if you follow the steps in order. The most important point: make the backup before touching partitions. With Ubuntu or Linux Mint, the installation process alongside Windows is practically automatic.
