Well I can't say if this is the best place to post this question but anyway.

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The best is to have you friend's Apple ID already setup and then Authorize your Computer from Itunes (I think its...

Check that event and see if it is recursive. Try deleting it then re-adding it to your calendar.

Ok, try the USB hub and let us know :)

I am pretty sure the sound you hear through your headphones are caused by Windows freezing, nothing to worry about. I recommend that you check and update your drivers as well.

Try disconnecting it and let it lose for some time and see if it solves the problem. You hear a static sound each time it locks up?

Do you have another power supply at hand? Try replacing it and see if there are any improvements.