dell xps 14z boot problem!

Hi Black_Dell,

Follow below mentioned steps to isolate the issue:

If your computer is set to first attempt to boot to another device, this may cause issues with successfully booting to Windows. To reset your computer’s BIOS to factory defaults, perform the following steps:

• Restart the computer
• At the Dell logo during restart, tap the key repeatedly until you see Entering Setup in the top right corner of the screen.
• Depending on the BIOS, you may need to press a key listed at the bottom of the screen to load default settings. For example, on the Inspiron N5110.
• Press ESC to exit the BIOS, and be sure to select Save and Exit to save your changes.

Boot the Computer into Safe Mode:

• Start the computer.
• Tap on the keyboard immediately after the Dell logo screen disappears until you see the Windows Advanced Options Menu on the screen.
• (If the Windows Advanced Options Menu does not appear, restart the system and try again.)
• Select Safe mode and press .
• Log on as the administrator or as a user with administrative access.

Check for Recent Changes:

If you are able to successfully boot to Safe Mode, check your computer to see if any new software or hardware was recently installed. If so, try uninstalling those programs or hardware from your computer.

Unplug All External Devices:

• A piece of hardware may be interfering with the normal boot process of Windows. Try unplugging all devices from your computer, including:
• Printers
• Scanners
• Media Card Readers
• Small Media cradles (iPod, PDA, MP3 player, etc.)
• Digital Cameras and Video Recorders
• USB storage devices
• CDs or DVDs from all optical drives
• The only devices you should leave attached to your computer are your monitor, mouse and keyboard, if the computer is a desktop.

Run a Computer Diagnostic:

To run PSA Diagnostics, turn on the computer and tap the key several times at the Dell logo screen. This will start the One-Time Boot Menu. Select Diagnostics to start the diagnostic assessment of the computer hardware.
For more information refer below link:

http://dell.to/Z9mLkn

Awaiting your response!