None of my usb ports are working. Can anyone give me a hint of what to do. I reinstalled my operating system but that didnt help.

If you have the knowledge you could open your PC and make sure the all the wires are connected or didn't fall out while moving the PC at some stage.

Make sure you read and understand about static. You may want to read this its about ESD, it'll explain all and make sure you don't accidentally ruin your PC.

ESD - What can I do to avoid damage

-wikety