This is the current recommended method for beginners!
We recommend beginners to use this method as it is the least error-prone and non-destructive. The following instructions were adapted from the Android-x86 project, so some of the images are from them. To look at Android-x86's original installation guide, click here.
Download Bliss OS
You can download a stable Bliss OS build by clicking on the link here, non-stable builds can be found here.
When booting into the installer, choose "Installation - Install Android-x86 to harddisk":
Booting into the installer
Once the installer boots, you will be asked to select the target drive. Choose the NTFS drive that houses your current Windows install. You do not need a separate partition, as the installer will create an image on your Windows partition.
Choose "Do not re-format" on the next screen. It is important that you choose "Do not re-format", as any other option will cause the installer to continue with the "Bootable installation method", which will result in permanent data loss, including your Windows partition!
Do not reformat
Choose "Yes" when prompted about the GRUB bootloader:
The installer will ask whether or not you want to make the system partition read/write-able. If you want to root your installation, you will choose "Yes" here. Otherwise, choose "No."
The installer will begin to write the changes to the disk. This will take some time. Go grab a coffee!
Grab a coffee
Then the installer will ask you how much space you want to allocate for the data image. Most users choose 8 GB, 16 GB, or 32 GB.
Congratulations! You should now have a functional dual-boot with Bliss OS!