To run an AI interview assistant for Windows, you install a desktop app on Windows 10 or 11, give it microphone access, and make sure the interviewer's voice plays through the same output device the app is capturing. With CoPilot Interview, that means downloading CoPilot_Interview_Setup.zip, extracting it, running the installer, and testing your audio with a free mock interview before the day that counts. You don't need to sign up to start.
Most Windows problems have nothing to do with the AI. They come from three places: the SmartScreen warning on first install, a privacy switch that blocks the microphone, and a headset that Windows routes differently from your meeting app. This guide takes them in order, then gives you a test routine and a troubleshooting table.
CoPilot Interview runs as its own desktop window, not a browser extension, next to Zoom, Microsoft Teams, Google Meet and coding platforms such as CoderPad and HackerRank. It shows live captions of the interviewer's question, then a structured answer in about 2 seconds.
Download and install on Windows 10 or 11
What you need first
Hardware is rarely the bottleneck: transcription and answers run on cloud models, so no GPU is needed. Figures are from our system requirements guide for AI interview assistants.
| Component | Minimum | Recommended |
|---|---|---|
| Windows | Windows 10 (64-bit) | Windows 11 |
| RAM | 8 GB | 16 GB if you also run a browser and an IDE |
| CPU | Dual-core | Quad-core |
| Disk space | About 1 GB free | A few GB free for updates |
| Audio | Any working microphone | Wired or USB headset |
| Internet | A few Mbps, stable | Wired Ethernet or strong 5 GHz Wi-Fi |
One note on Windows 10: the app supports it, but Microsoft ended Windows 10 support on October 14, 2025, and recommends moving to Windows 11.
Install in four steps
- Download from the official page. In the download section of the CoPilot Interview home page, choose Windows to get
CoPilot_Interview_Setup.zip. - Extract the zip. In File Explorer, right-click the file, choose Extract All, and open the extracted folder. Run the installer from there rather than from inside the zip preview.
- Run the installer. Double-click it and follow the prompts.
- Open the app. No account is needed to start. The Free plan gives you 15 minutes every day, sessions up to 15 minutes, and all four modes: Candidate Mode, Mock Interview, Interviewer Mode and the Resume Builder.
The free AI interview assistant page lays out what the Free plan includes and what paid plans add.
If you see "Windows protected your PC"
The Windows installer is not code-signed yet, so Microsoft Defender SmartScreen may stop it with a blue "Windows protected your PC" screen. According to Microsoft's SmartScreen overview, SmartScreen checks a downloaded app's reputation and the digital signature used to sign it, and when a file has no established reputation it's treated as higher risk and you see a warning. For a new, unsigned installer, that's expected.
To continue:
- Click More info under the message.
- Check that the app named is the CoPilot Interview installer you just extracted.
- Click Run anyway.
A Microsoft Store version is in progress. Until it's listed, the zip from the official download page is the way to install on Windows.
Allow microphone access in Windows
CoPilot Interview needs the microphone for Mock Interview, where it listens to and scores your spoken answers. Blocked microphone permission is also the first thing to check when no captions appear at all. Windows uses three switches, and people usually miss the last one because CoPilot Interview is a desktop app, not a Store app.
- Windows 11: open Settings > Privacy & security > Microphone. Turn on Microphone access and Let apps access your microphone, then scroll down and turn on Let desktop apps access your microphone.
- Windows 10: open Settings > Privacy > Microphone. Turn on microphone access for this device and Allow apps to access your microphone, then scroll down and turn on Allow desktop apps to access your microphone.
Microsoft's page on turning on microphone permissions in Windows walks through the same steps. Desktop apps don't get individual switches the way Store apps do, so the desktop-apps toggle is the one that covers CoPilot Interview. Restart the app after you change any of these settings.
Choose the right input and output devices
Windows keeps two default devices: the output, where sound plays, and the input, your microphone. Set both in Settings > System > Sound, under Output and Input, before you open the meeting app, and choose your headset in both places.
Which headset works best
- Wired or USB headset: the most reliable choice. Clean audio, no pairing, and no profile switching mid-call.
- Bluetooth earbuds: workable, but riskier. Using a Bluetooth headset's microphone often switches it into a lower-quality hands-free mode, and that mono audio makes captions less accurate. If you plan to use Bluetooth, test the exact pair you'll wear.
- Laptop speakers: avoid them for interviews. The interviewer's voice can echo back into your microphone and into the call.
Match your meeting app to Windows
Zoom, Teams and Meet each have their own speaker and microphone settings. Point them at the same headset Windows uses as its default, or at the option that follows the system default. Otherwise the interviewer's voice may play on a device that isn't being captured.
How audio from Zoom, Teams and Meet reaches the app
Your PC handles two separate audio streams. Your microphone carries your voice; system audio, the mix Windows sends to your headset, carries the interviewer's. To caption the question, an app needs the second stream.
Windows makes this straightforward with loopback capture: a desktop app asks Windows for a copy of the audio it's already sending to your output device. No virtual audio cable or extra driver is involved, and it doesn't matter whether the call runs in the Zoom or Teams desktop client or in Google Meet in your browser. If it plays through your headset, the app can hear it. Our explainer on how AI interview assistants capture system audio covers the details, including why browser extensions are limited to tab audio.
From there, the audio is streamed in short encrypted segments through our proxy to a speech-to-text model, the question text goes to the AI model you chose, and a structured answer appears in about 2 seconds. Session files stay in your own Documents folder, and nothing is kept on our servers beyond the request. The CoPilot Interview security page describes the full data flow.
For what live answers look like in coding, system design and behavioral rounds, see the real-time interview assistant overview. Follow the rules of the employer or assessment you're in — many people use it only to practice, which works on the free plan.
A pre-interview test routine with the free AI mock interview
Run this a day or two before the interview, on the same PC, headset and network you'll use on the day.
- Update first. Install pending Windows updates and restart, so nothing forces a restart during the call.
- Run a mock interview. Open Mock Interview, add your résumé and the job description, and answer three or four questions out loud. It reads each question aloud, then scores your spoken answer out of 10 with what to fix and a model answer. If you hear the questions in your headset and your answers get scored, your output device and microphone both work.
- Test the interviewer's side. Start a short call with a friend on the same meeting app as your interview. Switch to Candidate Mode and ask them to read a few interview questions. Check that the captions show their words, not yours, and that an answer appears in about 2 seconds.
- Change a device on purpose. Unplug and reconnect the headset during the test call. If captions stop, you've learned the fix in advance: reconnect, then restart the app.
- Read the report card. Redo your two weakest answers in another session. The Free plan's 15 minutes a day covers a short session daily.
It also gets you used to answering out loud, the part most people practice least. The AI mock interview page explains how questions are built from your résumé and the job description.
Interview day: a 10-minute Windows checklist
- Plug in and check the power mode. Avoid running a long call on battery. On Windows 11, open Settings > System > Power & battery and set Power mode for Plugged in to Balanced or Best performance rather than Best power efficiency. Turn off battery saver, called Energy saver on recent Windows 11 versions. Microsoft's guide to changing the power mode covers Windows 10 as well.
- Pause updates. In Settings > Windows Update, choose Pause updates so a restart can't land in the middle of your call.
- Silence notifications. Turn on Do not disturb in Windows 11 (Focus assist on Windows 10).
- Close heavy apps. Extra browser tabs and sync clients compete with the meeting app for memory.
- Connect, then launch. Headset first, then CoPilot Interview, then the meeting app. Confirm captions appear on the first thing the interviewer says.
- Arrange your windows. Windows key + Left arrow and Windows key + Right arrow snap two windows side by side, so the call and the app don't overlap.
- Use a stable connection. Ethernet if you can, otherwise sit near the router. Slow answers usually come from the network, not the PC.
Troubleshooting on Windows
Work down the table in order.
| Symptom | Likely cause | Fix |
|---|---|---|
| SmartScreen blocks the installer | The installer isn't code-signed yet | Click More info, then Run anyway, for a file you downloaded from copilotinterview.com |
| No captions at all | A microphone privacy switch is off, or the app was open when you changed it | Turn on all three microphone switches, then restart the app |
| Captions show only your voice | The call is playing on a different device from the one being captured | Set the same headset as the Windows default output and as the meeting app's speaker, then restart the app |
| Captions stop after you plug in a headset or dock | The active output device changed after launch | Connect devices first, then restart the app |
| Garbled or missing words | Bluetooth hands-free mode, or the call volume is very low | Switch to a wired or USB headset and raise the call volume |
| The call plays but the app hears nothing | Another app has exclusive control of the audio device | In the classic Sound control panel, open the device's Properties, go to Advanced, and clear "Allow applications to take exclusive control of this device" |
| Answers get slower as the call goes on | Unstable Wi-Fi, or a laptop on battery in a power-saving mode | Move to Ethernet or closer to the router; plug in and check the power mode |
Still stuck? Email support@copilotinterview.com with your Windows version and headset model. Still choosing a tool? You can compare AI interview assistants on platform support, pricing and free plans.
Set it up on your Windows PC today
Download CoPilot Interview for Windows 10 or 11, run a free AI mock interview to check your headset and microphone, and go into your interview knowing the setup works. 15 free minutes every day, no signup and no credit card.
Download CoPilot Interview freeFAQ
Does CoPilot Interview work on Windows 10 and Windows 11?
Yes. It runs as a desktop app on 64-bit Windows 10 and Windows 11. Microsoft ended Windows 10 support in October 2025, so Windows 11 is the better long-term choice.
Why does Windows say "Windows protected your PC" when I install it?
The Windows installer is not code-signed yet, so Microsoft Defender SmartScreen has no established reputation for it and shows a warning. If you downloaded the zip from copilotinterview.com, click More info and then Run anyway. A Microsoft Store version is in progress.
Do I need a virtual audio cable on Windows?
No. Windows lets a desktop app capture a copy of the audio it is already playing through your headset or speakers, so the interviewer's voice from Zoom, Teams or Meet reaches the app without extra drivers. Just make sure the call plays through the device Windows uses as its default output.
Why do the captions show my voice but not the interviewer's?
The interviewer's audio is probably playing on a different device from the one being captured. Set the same headset as the default output in Windows and as the speaker in your meeting app, then restart CoPilot Interview.
Is the Windows app free?
Yes. The Free plan costs $0 with no credit card and no signup, and includes 15 minutes every day, sessions up to 15 minutes, all four modes including Mock Interview, and the Resume Builder. Standard is $14.99 a month on sale (regular $19.99) if you need longer sessions.
Where does my interview audio go?
Session files stay in your own Documents folder. Audio is streamed in short encrypted segments through our proxy to a speech-to-text model, and the question text goes to the AI model you chose. Nothing is kept on our servers beyond the request.