Hi - thanks a million. The laptop spec is as follows:


HP ProBook 450 G3
Core i5 6200U / 2.3 GHz
Windows 7 Professional 64-bit Edition / Windows 10 Pro 64-bit Edition downgrade
...

I recently bought a HP Probook and within days I started getting BSOD - I had it replaced by HP and the same model replacement is now also giving BSOD. I deliberately didn't install anything on it...