E_AUTH_BAD_DEVICE_KEY: Please help!!

All of a sudden I get the "Activation Server error - code E_AUTH_BAD_DEVICE_KEY" message

I've tried to re-authorize my computer:

a. I've tried deleting the activation.dat file

b. I've tried authorizing using Adobe ID

c. I've tried authorizing using Overdrive ID

d. I've tried authorizing without ID

e. I've tried uninstalling ADE and reinstalling

f. I've tried uninstalling ADE 4.5 and installing ADE 3.0

None of the above worked. Please help!