7 Easy Steps to Partition Your Hard Drive to Dual Boot Windows

Step 1: Open Disk Management

Step 3: Right click your primary volume and shrink it

             Windows 10 requires 16GB (32bit) or 20GB (64bit), at best 20-30 GB

Step 4: Assign a Drive Letter and a Name to the Unallocated Space

Step 5: Load Boot Media

Step 6: Proceed with installation & choose the Custom Option

If you choose the Upgrade Option you can only boot from upgrade volume

Once you proceed you will be able to choose your partition

Step 7: After installation your PC will restart and you will be prompted to choose your preferred OS