You can go here and see how to manually enable Retpoline in Win10:
Mitigating Spectre variant 2 with Retpoline on Windows
I did this and the only change I see is I can no longer complete a PCMark10 benchmark. Could be related to this:
Microsoft confirms latest Windows 10 update causes issues with certain games
AMD Radeon Software Adrenalin 2019 Edition 19.3.1 Optional (06MAR2019)
Download | Release Notes
New Intel drivers:
Intel PROSet/Wireless Software and Drivers for Windows 7
Intel PROSet/Wireless Software and Drivers for Windows 8.1
Windows 10 Wi-Fi Drivers for Intel Wireless Adapters
Intel Wireless Bluetooth for Windows 7
Intel Wireless Bluetooth for Windows 8.1