Problem 1: Got the PADFlash programmer software installed on a Win8 64bit system, Windows detects the device driver, click Activate, but padflash software did not start. Any solution? Solution: PADFlash software cannot be installed on Windows 8 operating system. Only Win7 64bit or Win10 64bit system. Win7 64bit is the most stable system for padflash. Problem 2: Failed to open PADFlash software after clicking "Activate" button on Windows 10 64bit system. The device driver was installed. Solution: Keep the PADFlash UPDATER running. If padflash software cannot start on Win10 system, need to activate a Super Administrator Account in Windows 10. If it still is not working, go to c/windows/systembin/pdata , right click " paddlash. exe " and run the program as Administrator. Read also: http://www.pcmtuner.org/padflash-cannot-select-driver-all-buttons-are-gray-solution/