Hi eduard,
Welcome to Microsoft Q&A!
I’m sorry to hear you were interrupted during the first‑time setup and are now stuck in a sign‑in loop. This likely happened because Windows incorrectly assumes that an account was already finalized.
To better help you, there are a few details I’d like to ask: Are you using a Microsoft account for setup or local? Is there any account credential shown onscreen? Based on that, here’s what to try:
1 - If you’re using Microsoft account to sign in:
- Try your account password > confirm by signing into account.microsoft.com
- If you can sign in on web but fails on Windows, try Safe Mode to complete
- On the sign‑in screen, hold Shift + click Restart (Power button bottom‑right)
- Keep holding Shift until you reach Windows Recovery
- If it doesn’t work, force shutdown your Surface a few times.
- Select Troubleshoot > Advanced options > Startup Settings
- Click Restart > press 5/F5 to boot into Safe Mode with Networking
- Try signing with the Microsoft account you intended to use during setup.
- If Safe Mode allows you to sign in, the loop is resolved and no reset is needed.
2 - If that doesn’t work / Microsoft account is not established
- The Surface setup state is corrupted and, unfortunately, must be reset.
- Get into WinRE as instructed above > Troubleshoot > Reset this PC.
- Choose Remove everything (best option for a brand‑new device)
- Select Cloud download if available > follow the instructions.
If reset fails or loops again, you need to reinstall Windows using a Surface recovery image from another PC. This completely reset the device and guarantees a clean first‑time setup. Check out: Creating and using a USB recovery drive for Surface - Microsoft Support
Note that the steps above will delete all your data. Since you mentioned that this is in the setup process, I believe there shouldn’t be anything saved on your PC. But in case that there is, this will clear everything on the drive.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.