Ipod USB cable turns my computer off? WTF

[Praetor]

Up until recently, my cable works fine

today when I plug it in to charge, my computer goes off. Its not actually off -the power is on, but my monitors are off. The Ipod isnt charging either.
When I turn my computer off, if i plug the ipod inte the USB port it goes on in the same manner, not that i can actually use it but it sounds like its doing something

theres nothing wrong with the specfic port as it happens in any of them and all other devices are working fine

when I plug it into my laptop it wont charge but it has no other effect

I googled it and cant find anything

WTF, help!?