Today I decided to install Windows 8 (Release Preview) as the secondary OS option on my home laptop which is up and running with Windows 7 Ultimate .
My Requirement : I want to have dual boot on the same box. So Windows 7 is installed on C:\ for Windows 8 I want to install it on G:\ drive. (I already have partition created earlier C: , D:, F: , G:)
As a good practice you should have backup of required stuff from C:\ incase anything geos wrong
Steps to create Dual boot :
1) Download Windows 8 (Release Preview) ISO. In my case I downloaded 32 bit. [Note: This would upgraded to RTM in near future]
64-bit (x64) Download (3.3 GB) Sha 1 hash — 0xD76AD96773615E8C504F63564AF749469CFCCD57
32-bit (x86) Download (2.5 GB) Sha 1 hash — 0x8BED436F0959E7120A44BF7C29FF0AA962BDEFC9
Product Key: TK8TP-9JN6P-7X7WW-RFFTV-B7QPF
2) In order to create Bootable USB or DVD drive by burning the above downloaded ISO file . I took help Windows 7 USB/DVD Download tool to burn ISO to 4 GB USB 2.0 thumb drive.
It took 9 mins to burn ISO to make Bootable USB drive
Checking the content of USB I can see Setup.exe. Hurray !
3) Reboot Windows 7 Box while USB stick inserted and keep pressing F12 for Lenovo / Dell /Acer to reach Boot Menu. Mine is Dell Inspiron 1525
Select USB storage . This would start setup.exe from bootable USB stick
Now you would get Windows 8 Install Wizard
Select your language preferences ==> Click "Install Now" ==> Enter the product key TK8TP-9JN6P-7X7WW-RFFTV-B7QPF
Choose "Custom Install" Since we want to install on G:\ instead of C:\ drive (Default) . Select the desired partition. In my case I know it is Partition2.
Be careful not to overwrite your C:\ by mistake
And hit Next button . This process took roughly around 30 mins. Once the Installer is finished your system would be rebooted. Now you would be presented with the screen to select OS to boot in
After Selecting your Windows 8 you would be presented with option “To Personalize” Change Theme Color , Assign Name to Computer , Sign in Windows LiveID
Finally you would be logged into World of Modern UI . Here’s the Screen shot (You can see my Friend Rahul Soni in People Tile 
)
PS: There was not any need to install drivers for Dell Camera/ Mouse
PS1: Total process took 50 Min Approx
Enjoy the moment!
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