Short answer first: You do not need to download a specific "driver" from Philips. Windows 10 handles this speaker natively.
Philips never released a specific feature-rich driver suite for this model (like you see with Razer or Logitech). The speakers were designed to work immediately via the generic Windows driver.
Even with the correct driver, the SPA5210 has quirks. Here is your troubleshooting cheat sheet.
Unplug the speakers and plug them back in; Windows will force-reinstall the cleanest version of the driver.
The Philips SPA5210 is not a complex sound card. It is a USB-powered speaker system that relies on a generic USB Audio Class 1.0 standard.
chipset directly from C-Media and installing them manually through Device Manager. Troubleshooting "Device Not Detected"