I just received an Windows Update on my wireless lan card which required a reboot. My EVO was charging off my laptop. I have done this a thousand times before with other phones, however, this time, when I rebooted, the PC locked down at the opening screen. Long story short, my EVO was plugged in charging when this happened and I assume my computer thought it was a bootdrive. I unplugged the EVO and the computer booted fine. Just FYI, disconnect your EVO before you reboot your computer. This happened on a Toshiba Satellite laptop if that makes a difference.