I used "Reset this pc".  I get the "Hi there" screen that asks me to select country, time zone, etc.  When I click "Next", it takes me to a screen that says "Why did my pc reset" and says it's going to update.  When I click next it says "Just a moment".  Then after about five minutes I either get a black screen that says Dell or a black screen with a blue Windows symbol, then black screen, then back to the "Hi there" screen and the same thing happens again.  I've been through this over a dozen times hoping maybe some update was occurring but obviously I'm not getting anywhere.  I tried re-installing Windows from a usb but can't get it to boot from the usb.  I've tried pressing the power button off and on and then holding down/tapping F2, F12, F8 but I inevitably end up back at the "Hi there" screen.  I've tried pressing the power button off and back on three times but inevitably end up back at the "Hi there" screen.  What should I do?