If you are planning to install Ubuntu alongside Windows (Dual Boot), it is very important to change some system settings before installation.
Without proper preparation, you may face boot errors, installation failure, or data loss.
Follow these important settings before installing Ubuntu safely.
📌 What is Dual Boot?
Dual Boot means installing two operating systems on the same computer, for example:
Windows 11
Ubuntu
At startup, you can choose which OS to use.
💾 1. Backup Important Data (Most Important Step)
Before doing anything:
Backup Documents, Photos, Videos
Copy important files to external drive
Create Windows Restore Point
Clean preparation prevents data loss.
🔐 2. Disable Fast Startup in Windows
Steps:
Open Control Panel
Go to Power Options
Click “Choose what the power buttons do”
Click “Change settings that are currently unavailable”
Uncheck Turn on fast startup
Save changes
🔒 3. Disable Secure Boot (If Required)
Steps:
Restart PC
Enter BIOS/UEFI (F2 / F12 / DEL)
Find Secure Boot option
Disable it
Save & Exit
Note: New versions of Ubuntu usually support Secure Boot.
🧹 4. Shrink Windows Partition
Ubuntu needs free space Steps:
Press Windows + X
Select Disk Management
Right-click C drive
Choose Shrink Volume
Create at least 25–50GB free space
Do NOT format this space.
⚙️ 5. Enable UEFI Mode (Recommended)
Modern systems use UEFI.
Open System Information
Check BIOS Mode
It should show UEFI
UEFI is recommended for dual boot with Windows 11.
🔁 6. Create Ubuntu Bootable USB Steps:
Download ISO from official Canonical website
Use Rufus to create bootable USB
Select ISO file
Click Start
Now USB is ready.
🌐 7. Check Internet Connection
Ubuntu may download updates during installation.
Stable internet helps:
Faster installation
Updated drivers
Better hardware compatibility
📝 Final Words
Before installing Ubuntu in dual boot, proper preparation is very important. Disabling Fast Startup, shrinking partition, checking UEFI mode, and creating bootable USB correctly will prevent boot errors.
Take your time and follow each step carefully.
For more Linux and dual boot guides, visit EasySolveGuide.
❓ Frequently Asked Questions (Frequently Asked Questions)
Q1. Will dual boot delete my Windows?
No, if installed correctly, Windows will remain safe.
Q2. How much space is required for Ubuntu?
Minimum 25GB is recommended.
Q3. Should I disable Secure Boot?
Most modern Ubuntu versions support Secure Boot, but disabling may help in some cases.
