My passport drive not recognized

I am having a problem recently with my my passport 1tb external drive not bieng recognized on my pc and I end up having to re-install the driver and reboot and then Windows sees the drive.

I am running two systems.

HP laptop running Windows 8.1 with all current updates installed

Home pc is an Alienware X51 running Windows 8.1 with all updates installed also.

Happens on both systems.

Any ideas?

Try running a DLG test first to rule out any possible hardware damage. See below for more information.