Hey guy !
I'm have got a N900, it's great, i just used it a few moths ago!
one time i have use it's coppy data from my friend pc. He had scan virus on my device by soft nivira antivirus...
sine that time i can connect my device to pc
i can format or master flash it!
everything in device can not take out! my contacs, my calendal, my video...
when i plug the cable in to usb there are a box in pc screen "One of the USB devices attached to thí computer has manufutioned, and windows does not recogzined it. For assittance in sloving this proplem, click this messenge"

I had setup the conectivity soft of NOKIA with right cable type
i had setup pc suite and ovi soft
and try more pc!
Thank alot !

i don't know how to conect to pc or reset it!

i can't master- flash the N900 !
Any one can tell me please !