Hi,

I had the same problem: 'no suitable usb device found, waiting' (windows xp sp3).

Finally solved the problem by opening device manager and letting windows solve the problem (opening properties while my n900 was in update mode and plugged in. Windows said the device wasn't working properly and offered to fix it. And it did!) (eh?).

Anyway. It worked. Phone was flashed and boots again. Whew.