Computing device with developer mode

A computer implemented method, comprising:

• determining, by a computing device, a state of a mode-selection input device of the computing device, the mode-selection input device having a first state and a second state;
• when the mode-selection input device is in the first state, operating the computing device in a user mode, the user mode comprising:
• determining whether machine-readable instructions executed by the computing device are digitally signed by a trusted supplier of an operating system of the computing device,
• wherein:
• when the machine-readable instructions are digitally signed by the trusted supplier, executing, by the computing device, the machine-readable instructions;
• and
• when the machine-readable instructions are not digitally signed by the trusted supplier, executing, by the computing device, a recovery procedure to install an operating system recovery image on the computing device;
• and
• when the mode-selection input device is in the second state, operating the computing device in a developer mode, such that the computing device executes machine-readable instructions that are not digitally signed by the trusted supplier.

A computing device, comprising:

• a mode-selection switch having a first position and a second position;
• and
• firmware operably coupled with the mode-selection switch, wherein:
• when the mode-selection switch is in the first position, the firmware is configured to cause the computing device to:
• determine whether machine-readable instructions executed by the computing device are digitally signed by a trusted supplier of an operating system of the computing device, and
• wherein:
• when the machine-readable instructions are digitally signed by the trusted supplier, the computing device is configured to execute the machine-readable instructions;
• and
• when the machine-readable instructions are not digitally signed by the trusted supplier, the computing device is configured to execute a recovery procedure to install an operating system recovery image on the computing device;
• and
• when the mode-selection switch in the second position, the firmware is configured to cause the computing device to operate in a developer mode, such that the computing device executes machine-readable instructions that are not digitally signed by the trusted supplier.

A computing device, comprising:

• a mode-selection switch having a first position and a second position;
• and
• firmware operably coupled with the mode-selection switch, wherein:
• when the mode-selection switch is in the first position, the firmware is configured to cause the computing device to:
• determine whether machine-readable instructions executed by the computing device are digitally signed by a trusted supplier of an operating system of the computing device, and
• wherein:
• when the machine-readable instructions are digitally signed by the trusted supplier, the computing device is configured to execute the machine-readable instructions;
• and
• when the machine-readable instructions are not digitally signed by the trusted supplier, the computing device is configured to execute a recovery procedure to install an operating system recovery image on the computing device;
• and
• when the mode-selection switch in the second position, the firmware is configured to cause the computing device to operate in a developer mode, such that the computing device executes machine-readable instructions that are not digitally signed by the trusted supplier,
• wherein the computing device is configured to execute the recovery procedure in response to one of a recovery-mode selection device and determining the machine readable instructions are not digitally signed by the trusted supplier, the recovery procedure comprising:
• determining a state of the mode-selection input device;
• if the mode-selection input device is in the second state:
• locating an image stored on a removable storage device coupled with the computing device;
• determining if the image is digitally signed by the trusted supplier;
• if the image is digitally signed by the trusted supplier, replacing a current image on the computing device with the image stored on the removable storage device;
• if the image is not digitally signed by the trusted supplier:
• determining if a digital signature of the image stored on the removable storage device matches a digital signature of the current image of the computing device;
• if the digital signature of the image stored on the removable storage device matches the digital signature of the current image of the computing device, replacing the current image on the computing device with the image stored on the removable storage device;
• and
• if the digital signature of the image stored on the removable storage device does not match the digital signature of the current image of the computing device, executing a new image installation procedure.