Microsoft 365 Word problem

You can reset Word back to “factory-default” behavior in a few different ways, depending on what got changed (ribbon, template, add-ins, or Word’s registry settings). Try these in order (least invasive first).

1) Reset only the Ribbon / Quick Access Toolbar (easy)​

• Open Word.
• File → Options
• Customize Ribbon (right side) → Reset → Reset all customizations
• Also check Quick Access Toolbar → Reset → Reset only Quick Access Toolbar (or “Reset all customizations”).

This fixes most “I changed the UI and now it’s weird” issues.

2) Start Word in Safe Mode (tests add-ins)​

• Press Win + R
• Type: winword /safe and press Enter

If Word is normal in Safe Mode, an add-in is likely the cause:

• File → Options → Add-ins
• At the bottom, set Manage: COM Add-ins → Go…
• Uncheck add-ins (do them one at a time to find the culprit)

3) Reset Word’s Normal template (common “mystery changes” fix)​

Word’s default template is Normal.dotm. If it’s corrupted or heavily customized, Word can behave oddly.

• Close Word completely
• Press Win + R
• Paste this and press Enter:
  %appdata%\Microsoft\Templates
• Find Normal.dotm
• Rename it to: Normal.old (or Normal.dotm.bak)
• Start Word again (it will recreate a fresh Normal.dotm)

4) Full reset of Word settings (Registry reset)​

This resets many Word preferences back to defaults.
Warning: This edits the registry. It’s safe if you follow steps, but do it carefully.

• Close Word
• Press Win + R, type regedit, press Enter
• Go to (Microsoft 365 / Office 2016/2019/2021 usually use 16.0):
  HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Word
• (Office 2013 = 15.0, Office 2010 = 14.0, etc.
• Right-click the “Word” key → Export (backup)
• Then rename these keys if present (or delete them):
• Data → (rename to Data.old)
• Options → (rename to Options.old)
• Launch Word again

5) Repair Microsoft 365/Office (if Word itself is damaged)​

• Settings → Apps → Installed apps
• Find Microsoft 365 (or Office) → Modify
• Run Quick Repair first
• If not fixed, run Online Repair (takes longer, more thorough)

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Quick question so I can point you to the right “reset”​

What exactly did Word start doing (examples: changed margins/styles, weird font defaults, ribbon missing buttons, Word won’t open, constant freezing, etc.?
Also: you mentioned earlier Opera freezing—if Word is freezing too, that could point to a system-wide issue (GPU driver/add-ins), so tell me whether Word’s issue is settings/UI or crashing/freezing.
(Also, if you tried to attach screenshots/logs, none showed up on my side—please try uploading again if needed.