1. I don't have the Windows sounds, e.g. the start up tune;
2. I can't hear audio on some video clips in websites, e.g. online guitar lessons;
3. WMP apparently plays MIDI files, but I can't hear them;
4. In the "Sounds & Audio Devices Properties" dialogue box/Audio Tab, the MIDI Music Playback window is blank. I can select "Microsoft GS Wavetable SW Synth", apply it and OK it, but it doesn't help and, when I re-open the dialogue box, the window is blank again.
Strangely, I can play MIDI files in my sequencer program (Logic Hit Kit) & ITunes, and online guitar lessons etc play perfectly if linked to e.g. Quicktime.
If anyone can throw any light on these problems (which I'm sure must be linked somehow) I will be very grateful.