My computer doesn't recognize my droid x!

[AC Question]

my brother gave me his old droid x mb810. i forgot his password so i factory reset it a minute ago. it was a little dead, and i planned on rooting it. so i charged it. when i came back and hooked it up to my computer to root it. there was no "new device" pop- up on the computer. My droid didn't have the connected to computer notification. nothing! i don't know what could be wrong. can someone help me?

 

[B. Diddy]

Welcome to Android Central! Which cable are you using? Is it a reliable one? See what happens if you use another USB cable.