- haw to fix - couldn't start office installation microsoft office 365 : Error code 0-1018,2031,2035-0Another installation is in progress. Please try again later Error 0 - 1018
These codes usually mean another install, update, or uninstall is already running, or a previous setup is stuck. Try the steps in order.
1. Restart your computer
A restart often clears background processes that block a new installation.
Save your work, then restart your PC.
After you sign in again, run the Office installer once more.
2. Check for an installation already in progress
Look at the Windows system tray (bottom-right).
If you see an Office icon, open it and check progress.
Wait until the current install or update finishes before starting another one.
3. Use the Microsoft uninstall / cleanup tool
If the error continues, leftover or corrupted Office files may be blocking setup. Use Microsoft’s official tool to remove Office completely, then reinstall.
Download and run the Microsoft Uninstall Support Tool (sometimes linked with SaRA or the Office troubleshooter).
Choose the Office version to remove and follow the prompts.
Restart when cleanup finishes, then install Office again.
4. Online repair (if Office is partly installed)
If Office appears in Programs but won’t run:
Open Control Panel → Programs and Features (or Apps on newer Windows).
Right-click Microsoft Office → Change.
Choose Online repair (more thorough than Quick repair) → Repair.
5. Network and security
Installers can fail if firewall, antivirus, or the network blocks Microsoft servers.
Antivirus / firewall: Turn off third-party antivirus or relax rules temporarily while installing (turn protection back on after).
Network: On a strict work/school Wi‑Fi, try another connection (e.g. mobile hotspot).
Offline installer: If online setup keeps failing, use the Office offline installer from your Microsoft account (Subscriptions or Services & subscriptions).
Optional closing line for readers:
Are you installing Microsoft 365 for personal use, or for a work or school account? (Steps are similar, but licensing and download pages may differ.)
This may be a hectic process so you only need to run a Fix it tool from
Microsoft after that you will be able to install Microsoft office 365,
2013, etc. on your Windows computers like Windows 7, 8 8.1, and 10
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