5th generation iPod nano is not being recognized

I have 5th generation iPod. My computer (desktop) suddenly decided not to recognize my iPod as of yesterday.To experiment, I connected my iPod to my

brother's computer (laptop) and it worked fine. Suspicious that it was my computer that went haywire, I connected my dad's iPhone to my computer and it

recognized it.

I got uninstalled my iTunes and all other programs and installed them again. Didn't work. Put my iPod into disk mode. Didn't work. Checked my computer for

any virus. Didn't work. Even changed my USB cable. Didn't work.

So what is the problem here? Is it my iPod or my computer?