Cubase Elements 7 distorted vst playback

Lenovo i7 laptop.
Recently upgraded to Windows 10.
VST instrument playback is distorted and eventually the entire project slows down.
Plays imported wav files OK.
Downloaded ASIO4ALL but it does not show in the Devices menu.
Just shows Generic Driver as option.
Tried putting ASIO4ALL dll in to Asio folder in Programs but still does not appear.
It has worked since Windows 10 upgrade but now doesn’t.
Feels like a driver issue but I can’t get Cubase to recognise any other drivers apart from the supplied Generic Low Latency one supplied.
First time post.
Be gentle.