Make sure that the partition is primary, active, and formatted with NTFS.
Instructions for marking a partition as active using Diskpart:
Open an elevated command prompt:
Method 1: From Windows
Click on Start and type “command prompt”
Right-click on the application and select “Run as administrator”
Choose “Yes” when asked to confirm
Method 2: From a Windows install/repair disc
Boot into the install/repair disc and wait for it to load
Choose “Repair my computer”
Select “Command Prompt”
Type diskpart and press enter.
Enter list disk and note the number of the disk you want to install on.
Enter select disk n n is the number of the disk.
Enter list partition and note the number of the partition you want to install on.
Enter select partition n n is the number of the partition.
Enter active
You can now close the command prompt and re-attempt installation.