Cortana is Microsoft’s built-in virtual assistant, available on Windows 10 and Windows 11. It lets you search your PC, set reminders, answer questions, and control certain system settings using text or voice. Think of it as a smart search bar that can also have a conversation with you.
What Is Cortana?
Cortana launched in 2014 as part of Windows Phone and came to Windows 10 in 2015. Microsoft named it after an AI character from the Halo video game series.
At its peak, Cortana could book restaurants, track flights, and sync with your calendar across devices. Over time, Microsoft scaled back those features significantly. Today, Cortana functions mainly as a productivity assistant for Microsoft 365 users, a PC search tool, and a voice input option for users who prefer it.
It is still installed by default on Windows 10. On Windows 11, Microsoft removed Cortana from the taskbar but kept it as a standalone app you can open manually.
Cortana in Windows 10 vs Windows 11: Key Differences
| Feature | Windows 10 | Windows 11 |
|---|---|---|
| Taskbar integration | Yes, pinned by default | No, removed |
| Voice activation on startup | Yes | No |
| App availability | Built-in, always running | Available via Microsoft Store |
| Microsoft 365 integration | Yes | Yes |
| Consumer features (weather, jokes, chitchat) | Partially available | Mostly removed |
| Search bar connection | Tied to search | Separate from search |
On Windows 11, Microsoft clearly separated Search and Cortana. They used to be blended in Windows 10, which confused a lot of people. Now Cortana is its own standalone app, and the taskbar search bar handles local and web searches independently.
How to Open Cortana in Windows 10
There are three ways to launch it.
Option 1: Taskbar Click the circular or ring-shaped Cortana icon next to the Start button. If you do not see it, right-click the taskbar, hover over “Search,” and make sure it is showing.
Option 2: Voice Say “Hey Cortana” if voice activation is turned on. To enable it, open Cortana, go to Settings, and toggle on “Hey Cortana.”
Option 3: Keyboard shortcut Press Windows key + C to open Cortana with voice input ready.
How to Open Cortana in Windows 11
Microsoft moved Cortana off the taskbar in Windows 11. Here is how to find it.
Step 1: Click the Start button and type “Cortana” in the search bar.
Step 2: Click the Cortana app from the results.
Step 3: Pin it to your taskbar or Start menu if you use it often. Right-click the app icon and choose “Pin to taskbar.”
If Cortana is not installed, open the Microsoft Store, search for “Cortana,” and install it from there. It is free.
Setting Up Cortana for the First Time
When you open Cortana for the first time, it will ask you to sign in with a Microsoft account. This is required. Cortana does not work without one.
After signing in, it will ask for a few permissions. Here is what each one means.
Microphone access: Needed if you want to use voice commands. You can skip this and type instead.
Location access: Lets Cortana give you weather and local information. Optional but useful.
Calendar and email access: Connects with Outlook and Microsoft 365 to show your meetings, reminders, and tasks.
You can change these permissions later. Go to Settings > Privacy > Microphone to manage mic access, and Settings > Privacy > Location for location.
What Cortana Can Do?
Many of the flashy features from 2018 are gone. What remains is genuinely useful for productivity if you use Microsoft tools at work or school.
Tasks and Reminders
You can ask Cortana to remind you about something at a specific time or place.
Try saying or typing:
- “Remind me to call Ahmed at 3 PM”
- “Set a reminder for tomorrow morning to check my email”
- “Remind me when I get home to take the medicine”
These reminders sync with Microsoft To Do, so they show up on your phone too if you have the app installed.
Calendar Management
If your Microsoft 365 or Outlook calendar is connected, Cortana can tell you what your day looks like.
Ask: “What is on my calendar today?” or “Do I have any meetings tomorrow afternoon?”
It pulls this directly from your calendar and reads it out or shows it in the chat window.
Search Your PC
Cortana can find files, apps, and settings on your computer.
Say or type: “Find my resume” or “Open Settings” or “Where is my downloads folder?”
This is faster than clicking through folders manually.
Quick Answers and Calculations
Cortana can answer factual questions and do math on the spot.
- “What is 15 percent of 340?”
- “How many kilometers in a mile?”
- “What time is it in New York right now?”
For more complex research, it opens Bing in your browser.
Control Windows Settings
You can use Cortana to open system settings quickly.
- “Open Bluetooth settings”
- “Turn on Do Not Disturb”
- “Change my display brightness”
Not all settings are voice-controllable, but common ones work well.
Using Cortana with Microsoft 365
If your organization uses Microsoft 365, Cortana becomes more powerful. It integrates with:
- Outlook: Reads your emails, flags important ones, and helps schedule meetings
- Teams: Can surface meeting summaries and action items (in supported regions)
- OneDrive: Helps you find documents you recently worked on
- To Do: Syncs all reminders and tasks
Microsoft has positioned Cortana as a “personal productivity assistant” for business users. That is where it adds the most value today. If you are a student or home user without a Microsoft 365 subscription, Cortana is more limited.
For deeper productivity workflows, Microsoft’s own documentation on Cortana in Microsoft 365 is worth bookmarking.
How to Customize Cortana Settings
In Windows 10:
- Click the Cortana icon on the taskbar
- Click the three-line menu (hamburger) on the left
- Select “Settings”
From here you can:
- Toggle “Hey Cortana” voice activation on or off
- Choose whether Cortana activates on the lock screen
- Manage permissions for location, contacts, and calendar
- Clear your search history
In Windows 11:
- Open the Cortana app
- Click your profile picture or the three-dot menu in the top right
- Select “Settings”
The options are similar but slightly simplified compared to Windows 10.
Privacy and Cortana: What You Should Know
Cortana collects data to work properly. Microsoft uses your voice input, search queries, and calendar data to personalize responses. This data is linked to your Microsoft account.
If privacy is a concern, you can limit what Cortana accesses.
Go to Settings > Privacy & Security > Speech and turn off “Online speech recognition” if you do not want Microsoft to process your voice data on their servers.
You can also clear your Cortana data from the Microsoft Privacy Dashboard. This deletes your search history and interaction data tied to your account.
Cortana does not have an “offline only” mode. It requires internet access for most features.
Common Cortana Problems and How to Fix Them
Cortana is not responding to voice commands
Check that your microphone is set as the default input device. Go to Settings > System > Sound > Input and pick the right microphone. Also confirm “Hey Cortana” is enabled in Cortana settings.
Cortana app is missing in Windows 11
Open the Microsoft Store and search for “Cortana.” Install it from there. If it is already installed but not showing up in search, restart your PC.
Cortana keeps opening on startup in Windows 10
Open Task Manager, go to the Startup tab, find Cortana, and click Disable. This stops it from running automatically when Windows boots.
Cortana says “Something went wrong”
This usually happens when your Microsoft account is not properly signed in. Sign out of Cortana, restart the app, and sign back in. If the issue persists, run the Windows Store Apps troubleshooter from Settings > Update & Security > Troubleshoot.
Search and Cortana are slow
Disable “Search highlights” in Windows 10 Search settings. Also check if Windows Search indexing is running in the background and consuming resources via Task Manager.
Should You Actually Use Cortana?
Honestly, it depends on what you already use.
If you are deep in the Microsoft ecosystem, using Outlook for email, Microsoft Teams for work, and Microsoft To Do for tasks, Cortana makes your day slightly smoother. The calendar integration and reminder sync are genuinely useful.
If you use Google Calendar, Gmail, and Chrome, Cortana will feel limited. It does not connect to Google services.
For pure PC search, the Windows Search bar in Windows 11 does a better job now and does not require a Microsoft account.
Microsoft has also been rolling out Copilot, which is a more powerful AI assistant built into Windows 11. Copilot can do many things Cortana does, plus it is powered by a more capable AI model. In some regions, Copilot has already started replacing Cortana’s role in Windows.
Cortana vs Windows Copilot
| Feature | Cortana | Windows Copilot |
|---|---|---|
| AI model | Microsoft’s older assistant model | GPT-4 based |
| Setup needed | Microsoft account required | Microsoft account required |
| PC search | Yes | Yes |
| Chat-based responses | Basic | Advanced |
| File and app control | Limited | Expanding |
| Availability | Windows 10 and 11 | Windows 11 (2023 and later) |
If you are on Windows 11 and want a smarter assistant experience, Copilot is worth trying before sticking with Cortana.
Conclusion
Cortana is a built-in Windows assistant that handles reminders, calendar lookups, PC search, and quick answers. It works differently on Windows 10, where it sits in the taskbar, versus Windows 11, where it is a standalone app you open manually.
Setup takes about two minutes: open the app, sign in with your Microsoft account, grant mic and calendar access if you want those features, and start typing or talking.
It is most useful if you rely on Outlook and Microsoft 365 daily. For general users, Windows Search or the newer Copilot might serve you better in 2026. But if you have not tried Cortana since the early Windows 10 days, it is worth a fresh look. It is quieter and more focused than it used to be, which is actually an improvement.
Frequently Asked Questions
Can I use Cortana without a Microsoft account?
No. Cortana requires you to be signed in with a Microsoft account to function. This is because it syncs your reminders, calendar, and preferences to Microsoft’s servers. There is no local-only mode available. If you do not want to create a Microsoft account, the standard Windows Search bar handles file and app searches without any account.
Does Cortana work in all countries and languages?
Cortana is available in a limited number of countries and languages. As of 2026, full functionality is available in the United States, United Kingdom, Canada, Australia, India, and a handful of other markets. In other regions, some features may be missing or the app may not be available at all in the Microsoft Store. Voice recognition also works best in English, though Spanish, Chinese, French, German, Italian, Japanese, and Portuguese are supported to varying degrees.
Is Cortana still being developed or is Microsoft abandoning it?
Microsoft has significantly reduced Cortana’s consumer features over the past few years and shifted its AI focus to Copilot. However, Cortana is still maintained and still receives updates through the Microsoft Store. It has not been officially discontinued. For enterprise users with Microsoft 365, Microsoft has specifically said Cortana integration in productivity apps will continue. Consumer users may find Copilot to be the more future-proof option.
Does Cortana listen to me all the time?
Only if you enable “Hey Cortana” voice activation. When that feature is on, the microphone stays active in the background, listening for that wake phrase. If you turn it off, Cortana only accesses your microphone when you open the app and click the mic button. You can verify and control this through Settings > Privacy > Microphone on your Windows device.
What happened to Cortana on Android and iPhone?
Microsoft discontinued the Cortana mobile apps for Android and iOS in early 2023. You can no longer download them, and the existing apps stopped working. Reminder syncing that used to go through those apps now routes through Microsoft To Do instead. If you relied on Cortana on your phone, switching to the Microsoft To Do app is the direct replacement for that specific feature.
