Appro2 No Response Error Solution

 Microsoft auto update driver file may case Appro2 key programmer no response problem.

Here is the solution.

Insert APPRO2 USB cable.
Click Windows Start menu.
Input Device Manager and select it.

Select Universal Serial Bus controllers and find USB Serial Converter.

Rigth click Properties- Driver-Label- Update driver.

Browse my computer for drivers.

Select Let me pick from a list of available drivers on my computer.

Select driver version 2.12.28.00.
Latest 2.12.36.20 will cause appro2 no response issue.

Go to Ports (COM & LPT).
There may be many COMs, you can plug and insert AP2 USB to check the right one.

Right-click Properties- Driver label- Update driver.

Browse my computer for drivers.

Select Let me pick from a list of available drivers on my computer.

Select driver version 2.12.28.00.
Latest 2.12.36.20 will cause appro2 no response issue.

Restart software, plug and insert USB cable.
Done