Does anybody know a wma to midi converter?

[coulonnus]

Free, without any malware component? Of course the next step will be to convert the midi to a score. (wma is the format provided by the Windows tape recorder)

[poco.allegro]

Audio to MIDI is extremely hard to achieve, and perhaps when supercomputers become available to all population with intense AI capability "might" be possible.
Try Celemony Melodyne, if it fits your needs.
But as said, it is very hard to get error free tool.