Toshiba Canvio 3.0 1TB not recognized by Windows 7

This external HD used to work with no problem.  Now I can't get Windows 7 to see its connected.  Here are all the solutions I have tried:
Tried on multiple laptops including Dell Inspiron and HP Pavilion dv7
Tried every USB port on all those computers
Checked Device Manager: device is not listed
Check Disk Management: device is not listed
Ran Microsoft Fix-It.  It says Hardware not detected because Windows Update not set to automatically install drivers.  HOWEVER, it IS set to install the drivers.  Not to mention, the driver is already installed.
I just want to access this long enough to get the files off of it, because the Canvio is a bitterly sad disappointment.  (I wish I could get my money back, but since I trusted Toshiba products -- the laptops, PDA, and now tablet -- that I didn't think this would give me an issue.  In fact, I bought the Canvio over the competitors BECAUSE it's a Toshiba. Here, everyone reports problems with it after a few months.)

Some have luck with the freezer treatment.
If the files are important enough, you can pay to retrieve them. These guys have a good reputation.
   Ontrack Data Recovery Services
-Jerry

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