I have XP and an original UNO r3.
I’m following instructions per http://arduino.cc/en/Guide/Windows. Of course I have my UNO and USB cable Downloaded and unzipped in a folder “ Aduino-1.0.3 “ in MY DOCUMENTS. In this folder I have another: “ drivers “ which contains another folder “ FTDI USB Drivers “ And a few archives all called installation information, one of which is “ Arduino UNO Rev3 “. When I connect my UNO, to the USB port, the power LED goes ON, the L LED blinks rapidly For a moment and then starts flashing as though it were running the BLINK sketch, but it´s NOT 1s ON and 1s OFF. It´s about 0.5s ON, 0.5s OFF.
Windows recognizes NEW HARDWARE and starts the installation assitent and prompts for connecting to Windows Update.
NO and NEXT Install from a list Include,Examine My Documents, Arduino1.0.3, arduino-1.0.3, but when I click on drivers all I see is: FTDI USB Drivers. I can´t select the .inf archives MEGA, UNO, Micro, Lily……
If I go to Device Manager, I can see the yellow ?, under Other Devices, that indicates an USB device, lacking a driver! Meanwhile,the L LED keeps blinking at 0.5s rate. What could be wrong?