Chapter 4. Related Service Information; Reset Or Restore Windows; Passwords; Power-On Password - Lenovo ThinkPad L14 Gen 4 Hardware Maintenance Manual

Chapter 4. Related service information

This chapter presents following information:
• "Reset or restore Windows" on page 27
• "Passwords" on page 27
• "Power management" on page 30
• "Symptom-to-FRU index" on page 31
Service Web site:
When the latest maintenance diskette and the system program service diskette become available, they will
be posted on:
https://support.lenovo.com

Reset or restore Windows

To reset or restore Windows, refer to the information below：
• Use Lenovo recovery options.
1. Go to https://support.lenovo.com/HowToCreateLenovoRecovery
2. Follow the on-screen instructions.
• Use Window recovery options.
1. Go to
https://pcsupport.lenovo.com
2. Detect your computer or manually select your computer model.
3. Click Diagnostics ➙ Operating system Diagnostics and then follow the on-screen instructions.

Passwords

You can set a power-on password, supervisor password, system management password, or hard disk
password in UEFI BIOS to prevent unauthorized access to your computer.
If any of these passwords has been set, a prompt for it will be displayed on the screen whenever the
computer is turned on. The computer does not start until the password is entered.
Note: If only a supervisor password is set, the password prompt will not be displayed when the operating
system is started.
You can set a power-on password, supervisor password, system management password, or NVMe
password in UEFI BIOS to prevent unauthorized access to your computer.
If any of these passwords has been set, a prompt for it will be displayed on the screen whenever the
computer is turned on. The computer does not start until the password is entered.
Note: If only a supervisor password is set, the password prompt will not be displayed when the operating
system is started.

Power-on password

A power-on password protects the system from being turned on by an unauthorized person. The password
must be entered before the operating system can be started. For instructions on how to remove the power-
on password, see "How to remove the power-on password" on page 29.
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