Last Boot-Up and System uptime options under Device's Asset are showing different data

Last Modified

Tue Jan 29 20:16 GMT 2019

Description

This article provides brief information on the Last Boot-Up and System uptime options under Device Asset are showing different data.

Environment

All N-able N-central versions

Solution

While the options sometimes do show identical information, there are essentially different options monitoring different activity:

Last Boot-Up for example is monitoring how much time passed since system was physically turned on

System uptime on other hand is trying to show how much time passed since last login to system happened

They are also looking into different entries in Windows WMI repository:

For Last Boot-Up case we are searching for LastBootUpTime property under Win32_OperatingSystem class

For System uptime case we are searching for SystemUpTime property under Win32_PerfFormattedData_PerfOS_System? class

The values are displayed in seconds under the property so if you want to view them, you can follow this KB article and convert retrieved seconds into any other better time format

Most of the time you will see values differentiate when laptops are being used, because users tend to place laptop in sleep mode, rather than fully turn off device and do full boot up.