Event Details
Operating System->Microsoft Windows->Built-in logs->Windows 2008 or higher->Security Log->Policy Change->Authorization Policy Change->EventID 4705 - A user right was removed.
EventID 4705 - A user right was removed.
This event record indicates that a specific right assigned to the identified user was successfully removed on the computer where event was logged.
Refer to the link to learn about User Rights

Find more information about this event on ultimatewindowssecurity.com.

Corresponding events on other OS versions:
Windows 2000, 2003
     Sample:
    Log Name:      Security
    Source:        Microsoft-Windows-Security-Auditing
    Date:          10/28/2009 8:31:01 PM
    Event ID:      4705
    Task Category: Authorization Policy Change
    Level:         Information
    Keywords:      Audit Success
    User:          N/A
    Computer:      dcc1.Logistics.corp
    Description:   
    A user right was removed.
    Subject:
    	Security ID:		S-1-5-21-1135140816-2109348461-2107143693-500
    	Account Name:		ALebovsky
    	Account Domain:		LOGISTICS
    	Logon ID:		0x2a88a
    Target Account:
    	Account Name:		S-1-5-21-1135140816-2109348461-2107143693-1145
    Removed Right:
    	User Right:		SeTcbPrivilege
    Log Type: Windows Event Log
     Uniquely Identified By:
    Log Name: Security
    Filtering Field Equals to Value
    OSVersion Windows Vista (2008)
    Windows 7 (2008 R2)
    Windows 8 (2012)
    Windows 8.1 (2012 R2)
    Windows 10 (2016)
    Category Policy Change
    Source Microsoft-Windows-Security-Auditing
    TaskCategory Authorization Policy Change
    EventId 4705
    Field Matching
    FieldDescriptionStored inSample Value
    DateTime Date/Time of event origination in GMT format. DateTime 10.10.2000 19:00:00
    Source Name of an Application or System Service originating the event. Source Security
    Type Warning, Information, Error, Success, Failure, etc. Type Success
    User Domain\Account name of user/service/computer initiating event. User RESEARCH\Alebovsky
    Computer Name of server workstation where event was logged. Computer DC1
    EventID Numerical ID of event. Unique within one Event Source. EventId 576
    Description The entire unparsed event message. Description Special privileges assigned to new logon.
    Log Name The name of the event log (e.g. Application, Security, System, etc.) LogName Security
    Task Category A name for a subclass of events within the same Event Source. TaskCategory
    Level Warning, Information, Error, etc. Level
    Keywords Audit Success, Audit Failure, Classic, Connection etc. Keywords
    Category A name for an aggergative event class, corresponding to the similar ones present in Windows 2003 version. Category Account Logon
    Object Name -
    Whom -
    Object Type -
    Class Name -
    Security ID -
    Account Name -
    Account Domain -
    Target Account: Account Name InsertionString5 S-1-5-21-1135140816-2109348461-2107143693-1145
    Removed Right: User Right InsertionString6 SeTcbPrivilege
    Subject: Security ID InsertionString1
    Subject: Account Name InsertionString2 ALebovsky
    Subject: Account Domain InsertionString3 LOGISTICS
    Subject: Logon ID InsertionString4 0x2a88a
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