External hard drive not recognized in Disk Management

I am having a Simple Tech Pininfarnia 320 GB external hard drive, previously it was working fine but as long as I have inserted it into another PC I have got my external hard drive not recognized in disk management. Whenever I plugged it into my PC it tried to install the drivers but all the time it failed. At the end it shows a message that ‘Re-installing the driver might fix the problem'. So what should I be doing?

Well your PC is telling you that you are having problem with USB driver, so go to Device Manager and check for the yellow warning signs. Anyhow under Universal Serial Bus Controllers you will find USB Mass Storage Devices driver, make a right-click on that and uninstall it and then restart the PC. Now the Windows should re-install it automatically, if not then go to motherboard manufacturer's website and download it from there

There could also be other possibilities like, data loss or hard drive might get failed or circuitry in the enclosure has created an error. So in this case you should go for USB drive recovery.

Anyway, remove the drive from the enclosure and connect it with the internal connections of the PC. Or else you can get a USB Hard Drive Adapter from any computer accessories store (online or physically), afterwards plug it in any USB connection of a computer and see whether you can access your hard drive or not.

Still if you are not completely satisfied with this solution you could seek for more assistance at 1.800.347.5377.