Summary

Error 1315: Unable to write to the specified folder (shared folder) error is observed when performing a major upgrade or removing an installed target application from a shared location.

Project Types

• Basic MSI
• InstallScript MSI

Symptoms

Error 1315: Unable to write to the specified folder (shared folder) is observed when performing a major upgrade or removing a setup that is already installed at a shared location.

Cause

Error 1315 is observed on Windows 10 machines where Windows Update KB4551762 is installed.

Resolution:

To avoid Error 1315, make sure that the latest Windows updates are installed, specifically Windows updates released after Windows update KB4551762.

Reference:
A forum post that discusses this issue.