Hi everyone!

I purchased this Kindle Fire HD 7" in 2012. I've bought several since but let my older kids use this one. It's now got the FBI Virus. I know it needs to be reset to factory settings, but holding down the on/off button for 20 seconds or more doesn't do anything. This one has no side volume buttons.

Am I flat out of luck? It shows up in Windows 7 explorer when I plug it into my computer but there's nothing inside the icon when I click on it.