Office 365 Not Working on Windows 10? Here’s How to Fix It Quickly

Are you struggling with Office 365 not responding or failing to open after a Windows 10 update? You’re not alone. Many users encounter errors that prevent access to Outlook, Word, Excel, and other Microsoft 365 apps. This guide provides step-by-step solutions—both manual and automated Office 365 Backup Tool —to get your Office 365 working smoothly again while protecting your data.

Why Does Office 365 Stop Working on Windows 10?

Microsoft 365 (formerly Office 365) is a robust productivity suite, but it can occasionally run into problems. Here are the most common reasons:

Outdated software: Running an older version of Windows or Office 365 can cause compatibility issues.
Corrupt files: Damaged Office or system files may prevent apps from launching.
Outlook mailbox errors (.OST / .PST): Broken data files can block Outlook startup.
Add-in conflicts: Third-party add-ins or extensions can interfere with Office apps.
ClickToRunSvc service freezing: Background Office services can stop responding after sleep or hibernation.

Understanding the cause helps determine the best fix.

Quick Manual Fixes for Office 365 on Windows 10

1. Restart Your System and Check Internet Connection

Reboot your computer to clear temporary glitches.
Ensure a stable internet connection for Office updates.
Close unnecessary apps running in the background.

2. Update Windows 10 and Office 365

Update Windows 10:

Click Start → Settings → Update & Security → Windows Update.
Select Check for updates and install any pending updates.

Update Office 365:

Open Outlook → go to File → Office Account.
Click Update Options → Update Now.
Restart your computer after updates.

Keeping both your OS and Office up-to-date ensures smooth performance.

3. Repair Microsoft Office 365

Via Apps & Features:

Right-click Start Menu → Apps & Features.
Select Microsoft Office 365 → Advanced Options → Repair.

Via Control Panel (Online Repair):

Open Control Panel → Programs → Programs and Features.
Select Microsoft Office 365 → Change → Online Repair → Repair.
Restart your system.

Repairing Office can fix corrupted installation files and resolve startup issues.

4. Disable Problematic Add-Ins

Press Windows + R, type outlook.exe /safe, and hit Enter.
Navigate to File → Options → Add-ins → Go.
Uncheck unnecessary add-ins and click OK.
Restart Outlook normally.

Add-ins are a frequent cause of Office crashes, especially after updates.

5. Stop the ClickToRunSvc Service

Open Task Manager (Ctrl + Shift + Esc) → Services tab.
Find ClickToRunSvc, right-click → Stop.
Relaunch Office apps.

This is particularly helpful if Office freezes after resuming from sleep or hibernation.

Professional Solution: Backup & Repair with Office 365 Tool

If manual methods fail, a professional MacSonik Office 365 Backup & Repair Tool is the fastest, safest way to recover your apps and protect your data.

Benefits:

Backup Office 365 emails on Mac securely.
Restore corrupted OST and PST files.
Remove duplicate emails to free up space.
Supports multiple formats (PST, EML, MBOX, PDF).
Easy-to-use interface, no technical skills required.

How to Use the Tool:

Install and run the software as administrator.
Sign in with your Office 365 credentials.
Choose mailbox items to back up.
Select the preferred format (e.g., PST) and destination folder.
Apply optional filters → click Start Backup/Convert.

This ensures your files remain safe while resolving Office issues.

FAQs (Snippet-Friendly for Google)

Q1: Why does Office 365 stop working after Windows 10 update?
A: Compatibility issues, outdated software, corrupted files, and add-in conflicts are common causes.

Q2: How can I repair Office 365 without reinstalling?
A: Use Windows Apps & Features → Repair or Control Panel Online Repair.

Q3: Can I restore Outlook emails if Office 365 crashes?
A: Yes, using an Office 365 Backup Tool, you can back up and restore OST/PST files securely.

Q4: Do I need technical expertise to fix Office 365?
A: Basic manual fixes require minimal knowledge, but using a backup tool is recommended for non-technical users for safe and fast recovery.

Also Read: Export Office 365 Email to EML

Conclusion

Microsoft Office 365 is essential for personal and professional productivity. If it stops working on Windows 10, it can disrupt your workflow and risk your data.

Start with manual troubleshooting: restart, update, repair, and manage add-ins.
For reliable and fast recovery, use a professional backup and repair tool to protect your emails and documents.

Following these steps will restore Office 365, safeguard your mailbox, and prevent future data loss.

Written by alicewilson2534 87 days ago

Office Lighting: Creating a Healthy and Productive Work Environment

The level and hue of lighting can influence your mood and work performance. This is not really surprising as it has already been proven that more light equates to better..

The Importance of Regular Office Cleaning

Maintaining a clean and organized office is more than just a matter of aesthetics; it is a critical component of a productive, healthy, and professional work environment. While many businesses..

The Ultimate Guide to Office Digital Display Board : Transforming Communication in the Modern Age

In today’s fast-paced digital world, the need for effective communication has never been more crucial. Enter digital signage displays—dynamic tools that revolutionize how businesses and organizations convey messages. Whether it’s..

The Practical Office Furniture Moving Checklist Guide for Everyday Aussies

Office moves only run well when the basics are sorted early. I’ve seen plenty of jobs fall apart because a desk didn’t fit in the lift, the truck had nowhere..

Dr Bridges Office Offers Compassionate Care for Dental Anxiety

For many people, visiting the dentist can bring on feelings of stress or nervousness. Whether it’s memories of past experiences, fear of discomfort, or simply the unknown, dental anxiety is..

The Real Framework of Productivity – Office Fitouts Sydney

When people talk about productivity, they often think of software, management systems, or team training. But productivity starts with something more physical—the space you’re in and how it’s built to..

8 Design Trends Shaping Modern Workplaces Now

The modern workplace has evolved beyond cubicles and conference rooms. As businesses adapt to hybrid work and employee well-being takes center stage, office design is becoming a strategic tool for..

Trusted Moving Services for Offices and Homes

Relocating a home or office requires careful planning, reliable transport, and skilled professionals who understand how to handle belongings with care. In areas like Decatur and Rockdale County, moving services..

Transform Your Workplace with Frameless Glass Office Partitions

In today’s busy work world, it’s important to have a workspace that encourages teamwork, openness, and a modern look. At Clearly Frameless, we offer frameless glass office partitions that give..

What Makes Cloud-Based Business Tools So Effective Today?

Cloud-based software and tools are the present, not the future, of business. By storing information and applications running on distant servers that are reachable from any location with an internet..

How to Migrate from Google Workspace to Microsoft 365

If you find yourself steering a Google Workspace–to–Microsoft 365 migration, it’s common to feel overwhelmed by the labyrinth of configuration steps. Many administrators face the same uncertainty, which is why..

Transform Retail into a Connected Experience

Step into a modern retail world powered by Dynamics 365, where every point of contact - from point-of-sale to ecommerce - works together effortlessly. Your staff get instant access to..

Dubai Exchange 365: A Fresh Take on Modern Sports Engagement

If you’ve spent any time exploring digital sports platforms in recent years, you’ve likely come across the name Dubai Exchange 365. It’s popping up in conversations, forums, and user reviews—not..

Microsoft Copilot vs Microsoft 365 Copilot

Microsoft Copilot (Standalone AI Companion)A general-purpose conversational AI powered by GPT-4, embedded into Windows 11, Bing Chat, the Copilot app, and the browser. It helps with writing, chatting, image generation,..

How to Move Emails from Thunderbird to Office 365 Account?

In short, it can be hard to move emails from Thunderbird to Office 365, Outlook, or any other email client. This is very important when moving all of your contacts,..

Building Resilient Public Sector Organizations with U.S. Dynamics 365 Government Cloud Partners

IntroductionIn today’s fast-evolving world, public sector organizations face an array of complex challenges, ranging from increasing citizen demands and stringent regulatory requirements to the need for operational efficiency and enhanced..

How U.S. Dynamics 365 Partners Are Supporting Digital Transformation for Nonprofits

IntroductionDigital transformation has become essential for organizations across all sectors, including nonprofits. In today’s rapidly evolving technological landscape, nonprofits must leverage modern tools to optimize operations, enhance donor engagement, improve..

Partnering for Success: The Role of U.S. Dynamics 365 Experts in Franchise Business Expansion

IntroductionIn today’s competitive and digitally accelerated economy, franchise businesses are looking for more than just brand recognition—they demand operational agility, data-driven decision-making, and scalability to survive and thrive. This need..

Startup articles: launches, insights, stories