Troubleshoot and Fix your Problems Fast!
Difficulty: Moderately Hard Time: Considerable
In order to dual boot Windows 8, follow these steps carefully.
- Log in into your PC.
- Tap the Windows Key + R
- Type “ diskmgmt.msc”

- Locate your Primary Partition
- Right-Click your Primary Partition and select Shrink Volume

- Windows will now query for available space… wait until the progress bar finishes.
- Now, select the Disk Space to be greater or equal to 20 GB

- Select NFTS file system, and recommended options, if prompted.
- You will now have a new partition. Name this partition for easy reference

- Click here to Download the Windows 8 Release Preview Setup ( the Setup will detect if your system is 32-bit or 64-bit)
- Run the Windows 8 Relase Preview Setup….
- When Prompted click Install in another partition
- Prepare a blank DVD or USB( 3GB or greater)
- Select the USB or DVD from the option. This will configure the USB/ DVD as an Windows installation media
- Setup will notify that your installation media is ready
- Access your computer’s BIOS( in either Boot menu or a Boot utility)
- Prioritize your Boot Priority Order to the installation media you created. ( For instance, make CD-ROM the first priority if you created a DVD installation media)

- Insert your Installation Media and Restart your Computer
- A Windows Loading Screen will appear. Wait till loading is complete

- Select Install Now from the Windows Installation prompt
- Select Advanced Options when prompted. Select the partition that you created and click Next.
- Wait until Setup finishes installing Windows.
- You will be prompted that your computer will restart. Continue to Restart.
- Remove your installation media and continue. After restarting, Windows 8 will begin setting up personalization features and settings. You should see this screen:

- You have now installed Windows 8 on a separate partition to dual-boot.
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- Install Windows 8 From a USB Drive, Dual-boot with XP, Vista and 7 (techspot.com)