Fixing Microsoft Office 365 Error Code 0x43

Fixing Microsoft Office 365 Error Code 0x43

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Fixing Microsoft Office 365 Error Code 0x43
Office 365 may display error code 0x43 when the installer or updater encounters issues—often caused by corrupted cache, conflicting Office services, or interference from antivirus or firewall settings. This error interrupts installation or the update process, preventing Office apps from launching or updating properly. To resolve it, start by restarting your PC and then run the Office installer or update tool as an administrator to bypass permission restrictions. Next, clear the Office cache by deleting files in %localappdata%MicrosoftOffice16.0OfficeFileCache. After that, stop any running Office processes via Task Manager and disable third‑party antivirus or firewall software temporarily to eliminate interference. It’s also helpful to run sfc /scannow in an elevated Command Prompt to repair system file corruption. Once complete, reboot your system and rerun the Office setup or update. These steps typically resolve error 0x43—if you still encounter issues, follow a detailed step‑by‑step guide here: this walkthrough.