When my mouse became a "Unidentified device".

Symptoms:

• Computer boots and reboots two times.
• Mouse or other usb device wont install ("Unidentified usb device detected")
• Usb device suddenly stop working but it worked before.
• Computer wont start until you plug in all the usb ports.
• Computer plug in and plug out sound all the time!

This did not work:

• Removed usb driver.
• Reinstalled Windows.

When:

• Plug in my nexus pad into the usb port on my laptop with Windows 8.1. (22 Jun 2014)

What was wrong:

• Usb port was shorted.

How I fixed it:

• Turned off the computer and remove the power plug. Took a pen and leaned back usb head at the top.