The Professional edition of Windows 8 comes with “downgrade rights.” If you’re not happy with Windows 8 on a new computer, you can downgrade it to Windows 7 for free – as long as you have Windows 8 Pro.
You have to follow following steps for degrading window .
Step 1 - Open "Elevated Power Shell" in window 8 .
Go to "Apps" and type in search box "Powershell" .
Step 2 - Now type Confirm-SecureBootUEFI.
Step 3 - Verify the output
If system returns false that means BIOS is not set to Secure Boot and go to step no 5 .
Step 4 - Reset BIOS to default .
a) Go to settings -> Change PC settings -> General -> Advance Start-up - > Restart Now -> Troubleshoot -> Advanced option -> UEFI Firmware Settings then select Restart .
b) Now select setup defaults (may be F9 )
c) Select option "Save and Exit" (may be F10)
d) Disable secure boot control (Optional if popup window came )
Step 5 - To Boot up your DVD .
Click on the UEFI and Press Enter.
Now you can install window 7 in your system .
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