Seagate Portable External Hard Drive Slim not detected by PC

Hello I need urgent help with resolving this as I am trying to get the harddrive showing up or at least recover files.

I was using it at school first and my computer froze so I shut down the computer and restarted without safely removing the hard drive, at first the PC wouldnt reboot because I had it still plugged in, after unplugging it and the PC loaded up, it did not recognize the hard drive anymore. I have tried it on several PCs including the one at home all using Windows 7 and none of them recognize it.

I tried all USB ports on my PC and none of them work, the light on the hard drive is ON so I know there is no connectivity issue. I tried several free/trial softwares even the ones by Seagate and none of them recognized the drive so I cannot use their tools for recovering files or detecting the hard drive.

When I check the Disk Management, it does not show there.
When I check the Device Manager, it does not show under USB controllers but it DOES show under Disk Drives... I also checked and the drive is up to date.

The Model is BUP Slim BK.

In my quick launch, the drive is recognized there and gives me the option to Eject it but it doesn't actually Eject it when I click on it, it either stop responding or does nothing... unless I manually unplug it.

EDIT: After a really long time, the Eject message says the device is already in use which is probably why it doesnt Safely eject.

Did you try SeaTools for DOS ?
Sometimes that works better than SeaTools for Windows.
SeaTools for DOS | Seagate

Yes, it didn't help any more than the SeaTools for Win.