Lenovo ThinkPad E555 (English) Hardware Maintenance Manual - Page 47

Passwords, Power-on password, Hard disk password, Troubleshoot, Resetyour, Useronly, Master+User - keyboard

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Note: Ensure that your computer is connected to ac power. 1. Turn on or restart the computer. Before the Windows operating system starts, repeatedly press the F12 key. The Boot Menu window opens. 2. Select the recovery drive as the boot device. 3. Select a preferred language and then select a preferred keyboard layout. 4. Click Troubleshoot to display the optional recovery solutions. 5. Select a corresponding recovery solution according to your situation. For example, select Reset your PC if you want to reset your computer to the factory default settings. For more information about the recovery solutions provided by the Windows 8 and Windows 8.1 operating system, go to: http://go.microsoft.com/fwlink/?LinkID=263800 Passwords As many as three passwords might be needed for a ThinkPad notebook computer: the power-on password, the hard disk password, and the supervisor password. 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 42. Hard disk password There are two hard disk passwords: • User hard disk password - for the user • Master hard disk password - for the system administrator, who can use it to get access to the hard disk even if the user has changed the user hard disk password. Note: There are two modes for the hard disk password: User only and Master + User. The Master + User mode requires two hard disk passwords; the system administrator enters both in the same operation. The system administrator then provides the user hard disk password to the system user. Attention: If the user hard disk password has been forgotten, check whether a master hard disk password has been set. If a master hard disk password has been set, it can be used to access the hard disk drive. If no master hard disk password is available, neither Lenovo nor Lenovo authorized service technicians provide any services to reset either the user hard disk password or the master hard disk password, or to recover data from the hard disk drive. The hard disk drive can be replaced for a scheduled fee. For instructions on how to remove the hard disk password, see "How to remove the hard disk password" on page 42. Chapter 4. Related service information 41

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Note:
Ensure that your computer is connected to ac power.
1. Turn on or restart the computer. Before the Windows operating system starts, repeatedly press the F12
key. The Boot Menu window opens.
2. Select the recovery drive as the boot device.
3. Select a preferred language and then select a preferred keyboard layout.
4. Click
Troubleshoot
to display the optional recovery solutions.
5. Select a corresponding recovery solution according to your situation. For example, select
Resetyour
PC
if you want to reset your computer to the factory default settings.
For more information about the recovery solutions provided by the Windows 8 and Windows 8.1 operating
system,goto:
Passwords
As many as three passwords might be needed for a ThinkPad notebook computer: the power-on password,
the hard disk password, and the supervisor password.
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 42.
Hard disk password
There are two hard disk passwords:
• User hard disk password - for the user
• Master hard disk password - for the system administrator, who can use it to get access to the hard disk
even if the user has changed the user hard disk password.
Note:
There are two modes for the hard disk password:
Useronly
and
Master+User
. The
Master+User
mode requires two hard disk passwords; the system administrator enters both in the same operation. The
system administrator then provides the user hard disk password to the system user.
Attention:
If the user hard disk password has been forgotten, check whether a master hard disk password
has been set. If a master hard disk password has been set, it can be used to access the hard disk drive. If
nomasterharddiskpasswordisavailable,neitherLenovonorLenovoauthorizedservicetechniciansprovide
anyservicestoreseteithertheuserharddiskpasswordorthemasterharddiskpassword,ortorecoverdata
from the hard disk drive. The hard disk drive can be replaced for a scheduled fee.
For instructions on how to remove the hard disk password, see “How to remove the hard disk password”
on page 42.
Chapter 4
.
Related service information
41