My Passport 1TB on new laptop

I have a new laptop running windows 8,1. When I connect my My Passport drive which was previously used on a Windows 7 laptop, it shows up but is VERY slow. When I try to import images to Lightroom 5 nothing happens at all, it just hangs. Anyone shed any light on this?

Thanks

Hello and welcome to the community,

Make sure the USB drivers are up to date on this new computer!

Thanks for your reply. I did check and it says the drivers are up to date. I have also tried using a different USB port but that didn,t make a difference either.