Portable hard disk not detected

[sreekanthtv]

Hello,
Portable 500 GB hard disk not detected when connected to laptop(Dell-3GB ram)
Can any one help to solve this

 

[Gandalf]

If you have a USB mouse, try it on the same port to verify that the port works.

If the port proves operational, then try...
http://support.microsoft.com/gp/hardware_device_problems