Tonecache is a tiny program, completely free, that allows the user to capture any sound that comes out of the speaker and save it as a WAV file.
Tonecache is designed to capture these sounds without you having to worry about file names or overwriting, so that you can focus on captures, not on the management of these captures (which is automatic: the program deals with give them unique file names).
Tonecache also includes a volume control to choose the sound power of the recording.
For proper operation you need to have previously installed DirectX 9.0 as well as the NET Framework.
You can free download Tonecache 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.