Office Settings & Configuration

Fix Microsoft Word Capitalizing the First Letter of Words Automatically

Emma BrownEmma Brown Nov 3, 2026 868 views

Question details

Stop Microsoft Word from unexpectedly capitalizing the first letter of words, particularly the lowercase 'i', during typing.

How to Fix Microsoft Word Capitalizing the First Letter of Words Automatically
Product
Microsoft Word
Device & OS
not provided
Scenario
Typing documents in Microsoft Word, potentially affecting files stored in Microsoft Teams or occurring after a Microsoft 365 update.
Observed behavior
Word automatically changes the first letter of a word (like lowercase 'i') to a capital letter against the user's intent.
Before you start

Save your current document and close all running instances of Microsoft Word to ensure any session resets or setting changes are applied correctly.

Solution 1Recommended

Restart Microsoft Word in Safe Mode

Running Word in Safe Mode bypasses add-ins and temporary glitches, often resolving erratic AutoCorrect behaviors seamlessly.

Sometimes, recent Microsoft 365 updates or third-party add-ins can cause temporary glitches in Word's typing functions. Starting the application in Safe Mode helps determine if an add-in or a corrupt session is causing the unexpected capitalization.

1
Open the Run dialog

Press the Windows key + R on your keyboard to open the Run dialog box.

2
Launch Safe Mode

Type 'winword /safe' into the input field and press Enter or click OK.

3
Test the document

Once Word opens in Safe Mode, create a new document or open the affected file to test if the capitalization issue persists.

4
Restart normally

Close Word completely and restart it normally. In many cases, this simple reset permanently resolves the auto-capitalization glitch.

Restart Microsoft Word in Safe Mode
Teams Integration Note: If your original document is stored in a Microsoft Teams folder, the issue might be related to cloud synchronization. Launching in Safe Mode and restarting often clears these temporary sync anomalies.
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Frequently Asked Questions

Why does Microsoft Word capitalize the letter 'i' randomly?

This usually occurs due to Word's built-in AutoCorrect feature, which automatically capitalizes the standalone letter 'i' as a pronoun. It can also happen due to a temporary glitch or corrupted session following a Microsoft 365 update.

Will starting Word in Safe Mode delete my custom settings?

No, Safe Mode only temporarily disables add-ins and custom configurations to help identify problems. Your normal settings and templates will return intact when you restart Word normally.

How do I stop Word from capitalizing the first word of every line?

You can disable this default behavior by going to File > Options > Proofing > AutoCorrect Options, and unchecking the 'Capitalize first letter of sentences' and 'Capitalize first letter of table cells' options.

Can third-party add-ins cause unexpected formatting changes in Word?

Yes, outdated or conflicting third-party add-ins can interfere with Word's native AutoCorrect functions and clipboard management, leading to erratic behavior like unwanted capitalization or formatting shifts.