Min gissning är att det är en gammal dator om den har Win ME och därmed antagligen USB 1.0. Jag gissar att Iphone vill ha 2.0 för att kunna ladda. Köp en laddare som man sätteri väggen? Finns bland annas hos apple.
Om 2.0:
Battery Charging Specification 1.0: Released in March 2007.
Adds support for dedicated chargers (power supplies with USB connectors), host chargers (USB hosts that can act as chargers) and the No Dead Battery provision which allows devices to temporarily draw 100 mA current after they have been attached. If a USB device is connected to dedicated charger or host charger, maximum current drawn by the device may be as high as 1.5 A. (Note that this document is not distributed with USB 2.0 specification package.)