7.2.1 My computer went into power-down/hibernate mode, and now my debugger won’t work. What happened?

When using the emulator for prolonged periods of time, and especially as a debugger, be sure to disable the Hibernate mode in the Power Options Dialog window of your computer’s operating system. Go to the Hibernate tab and clear or uncheck the “Enable hibernation” check box. This will ensure that all communication is maintained across all the USB subsystem components.