No Sound on Windows 10

I’ve been at work (school!) all day, so have only just started to try out some of your ideas (thanks for them!)

I’ve tried replacing the Lenovo (maker of my laptop) audio driver with the Windows 7 version using the exe file they provide from their website (auto-identifying the laptop.) No luck - no difference with Dorico - still no sound, despite trying various combinations of computer audio settings (frequency and number of bits) and loading/unloading Dorico playback settings and device settings. Sound continues to play normally outside Dorico (unless I have the ASIO excusivity option on.) I have not yet tried uninstalling the windows 10 audio drivers first before installing the windows 7 drivers, so might try that next. Meanwhile, here’s the dxdiag file requested.
Philip
DxDiag.zip (15.5 KB)