Installed this into my Dell Latitude 7280 and running Windows 7 Ultimate. Getting it to work initially was a giant pain in the but once I had the BIOS version correct, and the correct version of Windows 7 (Ultimate), everything was fine; (Basically, get ultimate b/c any other version of 7 will either not work at all, or be unreliable).You'll need to side-load the correct driver into the Windows 7 installation package for the OS to recognize the drive; and this is the thing that will take the longest to get right. If in doubt, just do Windows 10, because yes, it's possible to install and use this with Windows 10 but I opted to go for the Windows 7 Ultimate route as I prefer almost everything about that OS to W10.The performance of this thing is awesome, and I love the 1TB size; pretty much my entire 1TB cloud storage account fits on here and is live-updated to the cloud as I make changes on my laptop.