Hi Tom, Welcome to our community. The system that you own is not compatible with Windows 10. That is the reason of the system being nonresponsive as there are lot of application that requires the right type of a driver compatible with Windows 10. In regards to the troubleshooting, run the hardware diagnostics once again to check if there is any hardware damage. Share if you see any error code and a validation code. Also, share the service tag, registered owner of the system via private message, so that we can check for more details. To send a private message, click on my name and select ‘Send private message’
Hi all, Thanks in advance for any help you can provide. I upgraded (seemingly free) to Windows 10 (from 8.1 but suffered with various non-responsive issues so tried to install Win 7 from external usb  DVD drive. No luck here as windows would not recognize any internal drive. My  next thought was to try and use Dell provided USB recovery and Restore USB. This starts to work but than hangs about 20 minutes in and just doesn't move, tried waiting overnight etc. I have previously done a FULL system diagnostic check and nothing indicated wrong with hardware. Any help would be very appreciated. I don't mind Windows 8.1, 7 or whatever - this is just a laptop for tethering my digital cameras to while shooting. Tom
Dell XPS l421 - Dell Recovery and Restore USB hanging forever.....