Microsoft Office may fail to install, repair, or update when error code 30015‑1015 (‑32) appears—usually indicating the installer can't access or modify required files due to permission issues, corrupted installation files, or conflicts with existing Office components. This halts the process and leaves Office unusable. To resolve it, restart your PC to clear any locked files and then launch the Office installer or repair tool as an administrator. If the error persists, fully uninstall all Office versions using the Microsoft Support and Recovery Assistant or via Control Panel → Programs and Features. Once uninstalled, delete leftover folders in
%ProgramFiles%Microsoft Office (and %ProgramFiles(x86)% if present), then run Disk Cleanup to clear temporary files. Next, open an elevated Command Prompt and execute sfc /scannow to repair corrupted system files that may be interfering with installation. Afterward, reboot your PC, disable any third-party antivirus or firewall temporarily, and relaunch the Office setup or repair process—preferably in a clean‑boot environment to avoid conflicts. These steps typically resolve error 30015‑1015 (‑32) and allow Office to complete installation or updates successfully. For a full, step‑by‑step walkthrough with troubleshooting tips, check out this detailed guide.