Usb dispositive not recognized

Development Tools IDE 1.x
1

Hi,
Yesterday I came back home and pluged in the Arduino Nano (not 3.0), but windows 7 said that my dispositive were not regognized. One day before that, i uploaded many codes, and he was working fine, but now he doesen't connect to my pc.
The last program that I uploaded is working fine in arduino, but i can't comunicate with PC by serial, and the PC doesen't recognize the Arduino.
What I have done:

  • Manualy downloaded drivers
  • Tried to connect in another pc
  • Tried to download bootloader
    Can anyone help me?
    Ivan
2

When you plug it ,on device manager did apear a new COM PORT?

3

Problem solved:
I needed a external power supply.
lol, i don't know why that happend!
Ivan