Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: Dell Inspiron 14z Auto Logs In and starts Device Diagnostic Tool

21 Feb 2017   #1

Windows 7 Home Premium x64
Dell Inspiron 14z Auto Logs In and starts Device Diagnostic Tool


I have a Dell Inspiron 14z that I recently received from a friend. When I boot it up, it automatically logs in to an account with the name "TMO" and starts up a T Mobile Device Diagnostic Tool. I cannot get out of this. When I try to minimize it, it bounces right back. When I try to press the x button, it gives me three options: Restart System, Restart Application, and Cancel. Restart System just restarts and brings me back to this screen. Restart Application just brings me back to this screen, and Cancel just does nothing. When I press Ctrl-Alt-Del, it only gives me one option: Switch User. I cannot add user, and the only option is to click TMO, at which point it signs in again. Clicking on the Ease of Access center doesn't work. Shutting down doesn't help either because it boots into the Device Diagnostic Tool each time. I've tried going into Advanced Boot Options, but it seems like the key combinations are different from what I remember. On startup, pressing these keys do the following:

F2: Aptio Setup Utility
F8: Nothing
Shift-F8: UEFI Options which takes me to Dell Diagnostic Tests (not Device Diagnostic Tool)
F11: Automatic Repair which just says it will repair and then continues to sign in and start the Device Diagnostic Tool
F12: UEFI Options which gives me a choice between Windows Boot Manager and UEFI Network Card.

Do I need to boot from a USB drive and reinstall windows? Thanks

My System SpecsSystem Spec

 Dell Inspiron 14z Auto Logs In and starts Device Diagnostic Tool

Thread Tools

Similar help and support threads
Thread Forum
BSOD's on user account, auto reboots & auto logs-in to Admin account
Greetings, A friend of mine has been having a recurring issue with his computer that's getting worse. I've spent hours going through the forums, but haven't seen anything about this, so I'm posting here. Any help would be greatly appreciated. ISSUE: He uses his computer with a password...
System Security
Upgrading RAM on Dell Inspiron 15R and Dell Inspiron 7548 laptops
Hello everyone, Both the laptops Dell Inspiron 15R and Dell Inspiron 7548 came with 6 GB of RAM. I'd like to upgrade it to at least 12 GB by replacing the 2 GB dimms in both laptops with 8 GB dimms. Was wondering whether it is safe and okay to combine different memory modules from different...
Hardware & Devices
(Dell Inspiron) No bootable device
Hello, I've got a Dell Inspiron 5520 laptop I purchased new only a few months ago. Several times I've gotten an error re "no bootable device", usually after a reboot (I don't often shut it down unless required to by updates) but also sometimes after a hard crash caused by as-yet-unknown factors. ...
Hardware & Devices
DW 1525 Adapter Device Not Found - Dell Inspiron 570 desktop
This W7 desktop has been working with an ethernet cable for years, but we just recently changed things around in our house and it's no longer in the room with the modem and router. 'No problem', I tell the wife, 'this is Windows 7, and on this OS even the desktops have built in wireless...
Dell inspiron 531 starts to color patterns
Even after swapping monitors, a friend's Dell is starting immediately to multi-changing-color checkerboards whether trying to start normally, enter BIOS, F8 or F12. Previously she could see the Dell logo and Advanced Boot tools choices, but no longer. It appears it has onboard graphics chip so...
Hardware & Devices

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 18:43.
Twitter Facebook Google+