Microsoft 365 Apps Not Opening or Stuck on Loading Screen (2025 Fix)

Microsoft 365 Apps Not Opening or Stuck on Loading Screen? (2025 Fix)

Are Microsoft 365 apps like Word, Excel, Outlook, or PowerPoint not opening at all? Do they get stuck on the loading screen and never start?

This is a common Microsoft 365 issue in 2025, especially after Windows updates, license sync problems, or corrupted Office files. In this guide, we explain why Microsoft 365 apps fail to open and how to fix the problem step by step.

Common Symptoms

• Microsoft 365 apps won’t open
• Word or Excel stuck on loading screen
• Outlook opens but freezes immediately
• Office apps open blank and close
• Microsoft 365 shows “Processing” or “Starting”

Why Microsoft 365 Apps Stop Opening

• Corrupted Office installation
• Broken Microsoft 365 license activation
• Windows update conflicts
• Damaged Office cache files
• Conflicting add-ins
• Antivirus or firewall blocking Office

Fix 1 – Restart Microsoft Office Services

1. Press Ctrl + Shift + Esc to open Task Manager
2. End all Microsoft Office related tasks
3. Restart your computer
4. Try opening the app again

Fix 2 – Run Microsoft 365 Apps in Safe Mode

1. Press Windows + R
2. Type winword /safe (for Word)
3. If the app opens, disable all add-ins

Faulty add-ins are a major cause of Office loading issues.

Fix 3 – Repair Microsoft 365 Installation

1. Open Control Panel → Programs
2. Select Microsoft 365
3. Click Change
4. Choose Quick Repair
5. If needed, run Online Repair

Fix 4 – Check Microsoft 365 License Status

Sometimes apps won’t open due to license sync errors.

1. Open any Office app
2. Go to File → Account
3. Sign out of your Microsoft account
4. Restart the app and sign in again

Fix 5 – Disable Antivirus Temporarily

Some antivirus programs block Office background processes.

• Temporarily disable antivirus
• Try opening Microsoft 365 apps
• Add Office to antivirus exclusions

Fix 6 – Update Windows and Office

• Install pending Windows updates
• Update Microsoft 365 from File → Office Account
• Restart your system

When to Contact Microsoft 365 Support

If none of the above fixes work, the issue may involve:

• Corrupted user profile
• Registry conflicts
• Enterprise licensing errors

Professional assistance can save time and prevent data loss.

Need Help Fixing Microsoft 365 App Issues?

Our certified Microsoft 365 experts can diagnose and fix app loading issues quickly.

📞 Call Now or 💬 Chat on WhatsApp to get instant support.