Downgrading Windows 10 enterprise to pro

Computer Type: PC/Desktop
System Manufacturer/Model Number: Homebrew
OS: Windows 10
CPU: i7 6700
Motherboard: Asrock Z170 Extreme7+
Memory: 32 GB DDR4 2133
Graphics Card: MSI GeForce GTX 1070
Sound Card: Asus Xonar DC
Monitor(s) Displays: 2xDell 2717 UltraSharp
Screen Resolution: 1980x1200
Keyboard: MS Comfort Curve 4000
Mouse: Logitech M325
PSU: Corsair 850 Platinum
Case: Rosewill BlackHawk Ultra
Cooling: Dynatron K985 Ball Cooler
Hard Drives: Primary: Samsung 500 GB NVMe 950 2xRAID Cards with 2X250 GB Samsung mSATA SSD Various other SSDs & HDs
Internet Speed: 890Up/45Down
Browser: All of 'em
Antivirus: Norton
Other Info: January 2016 build

Computer Type: PC/Desktop
System Manufacturer/Model Number: Homebrew
OS: Win10 Enterprise Insider Preview
CPU: i7-4770K
Motherboard: ASRock Z97 Killer
Memory: 32 GB DDR3 [PC3-10600]
Graphics Card: ASUS GeForce GTX 1070
Sound Card: onboard RealTek circuitry
Monitor(s) Displays: Dell 2717 27" UltraSharp
Screen Resolution: 1920x1080
Keyboard: MS Comfort Curve 4000
Mouse: Logitech M325
PSU: Corsair Platinum 850
Case: Antec 902
Cooling: Corsair Closed-loop liquid cooler
Hard Drives: M.2 SATA SSD: Samsung MZVP512 Intel SATA 180 GB SSD Samsung Spinpoint 1.5 TB HD Toshiba HGST 3 TB HD JMicron RAID card w/2xSamsung EVO 840 250
Internet Speed: 890Up/45Down
Browser: All of 'em
Antivirus: Defender
Other Info: Test machine for Insider Previews