I just purchased an Apple iPod. I make sure to disconnect the iPod properly (by "ejecting" it and then by using the "remove hardware safely" utility which does recognize the iPod). When it's time to shut down my computer, at the very end of the process a blue screen comes up saying "Hardware Malfunction. Call your hardware vendor for support. NMI: Parity Check/Memory parity Error The system has halted. It only does this after I have been using the iPod. I have called Apple support to make sure I am disconnecting the iPod correctly, and they say that I am. What could be causing this? Is it bad for my computer to have to shut down by pressing and holding the on button?