Event ID - 1021

Event Id1021
SourceMsiInstaller
DescriptionProduct: %1 - Update '%2' could not be removed. Error code %3. Windows Installer can create logs to help troubleshoot issues with installing software packages. Use the following link for instructions on turning on logging support: http://go.microsoft.com/fwlink/?LinkId=23127
Event InformationAccording to Microsoft :
Cause
This event is logged when Product Update could not be removed.
Resolution
Review the system log file
Microsoft Windows Installer encountered an error while installing, updating, or removing an application. For more information about the error, you will need to open Event Viewer and examine the System log file.
To review the system log file for Windows Installer events:
1.Click Start, point to Administrative Tools, and then click Event Viewer.
2.In the navigation pane, find the System event log.
3.In the Actions pane, click Filter current log...
4.In the Filter Current Log dialog box, select the Filter tab and then select MsiInstaller from the Event Sources drop-down.
5.Review the most recent Windows Installer events to determine the cause of the issue. In addition to the Windows Installer events, you should also review the other system events to determine if a related issue may be the cause of the Windows Installer error.
6.If you cannot resolve the issue based on the information in the event log, try reinstalling the application.
Note: If Windows Installer logging is not enabled, no information will be available in Event Viewer.
Verify
To verify that logging is currently enabled:
1.Click Start, click Run, type regedit, and then click OK.
2.Check to see whether the following registry key is present in the Registry Editor: HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Installer.
Note: If Windows Installer logging is not enabled, no information will be available in Event Viewer.
Reference LinksEvent ID 1021 from MsiInstaller

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