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Title
sEstimatedSize2 Value is Left Behind in the Uninstall Registry Key After Uninstallation

Summary

This article explains why the uninstall registry key may not get removed due to sEstimatedSize2 being left behind and where this value comes from.

Symptoms

After uninstalling on a Windows 10 or Windows Server 2016 machine, the uninstall registry key, "HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall\{ProductCode}" may have a registry value named sEstimatedSize2 left behind.

Cause

The sEstimatedSize2 registry value is not created by InstallShield. This can be observed right after an installation completes as sEstimatedSize2 should not be seen in the uninstall registry key for the corresponding product. The registry value has been observed to be created by a Win32 service called Storage Service (StorSvc.dll) on Windows 10 and Windows Server 2016 some time after installation.

Resolution

This is a Microsoft issue regarding Storage Service and cannot be resolved by Flexera.

Workaround

To make sure the uninstall registry key gets removed during uninstallation, the RemoveRegistry table or a custom action can be used to programmatically remove the registry data during uninstall.

Additional Information

Removing Registry Data Created by Your Product
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sEstimatedSize2 Value is Left Behind in the Uninstall Registry Key After Uninstallation