Trezor Not Recognised by Computer: Complete Fix Guide (2026)

Quick Checklist

Before going through full solutions, check these basics:

Is the Trezor screen lit up when connected? (If blank, it’s a power issue)
Are you using the cable that came with the device?
Is Trezor Suite up to date?
Are you connecting via USB, not a hub or extension cable?

Fix 1: Try a Different USB Cable

The most common cause. Many USB cables are charge-only and don’t carry data. Trezor requires a data cable.

Use the cable included in the Trezor box
Try a USB cable labelled “USB 3.0” or “data transfer”
Avoid phone charger cables — they often don’t carry data

Fix 2: Try a Different USB Port

USB hubs and front-panel desktop ports can be unreliable. Try:

A direct port on the back of a desktop (connected directly to the motherboard)
A different port on a laptop
A different computer entirely, to rule out computer-specific issues

Fix 3: Install Trezor Bridge

Trezor Bridge is a background service that allows web browsers and desktop apps to communicate with Trezor devices. Without it, Trezor Suite may not detect the hardware.

Go to trezor.io/trezor-bridge
Download for your operating system
Install and restart your computer
Reconnect the Trezor

Trezor Suite installs Trezor Bridge automatically on first launch, but it may have been removed by antivirus software or system cleaning tools.

Fix 4: Windows — Check Device Manager

Windows sometimes fails to assign the correct driver to the Trezor.

Connect your Trezor
Open Device Manager (search in Start menu)
Look for an Unknown Device or a device with a yellow warning icon
Right-click → Update driver → Search automatically

If the driver installs successfully, Trezor Suite should detect the device.

Fix 5: macOS — Allow the Device

macOS Ventura and later may block new USB devices until explicitly approved.

Go to System Settings → Privacy & Security
Look for a prompt about a blocked USB device
Click Allow

Also ensure Trezor Suite has the necessary permissions under Privacy & Security.

Fix 6: Reinstall Trezor Suite

A corrupted Trezor Suite installation can cause detection failures.

Uninstall Trezor Suite (including app data if prompted)
Download the latest version from trezor.io/trezor-suite

Install fresh and reconnect the device

Fix 7: Check Security Software

Antivirus and firewall software can block Trezor Bridge or Trezor Suite from communicating with the device.

Temporarily disable antivirus and try again
If it works with antivirus off, add Trezor Suite and Trezor Bridge as exceptions
Common culprits: Avast, McAfee, Kaspersky, Windows Defender Firewall

Fix 8: Update Trezor Firmware

If your Trezor is running old firmware, it may not be compatible with the current Trezor Suite version.

In Trezor Suite, go to Settings → Device
If a firmware update is available, install it
Note: if the device isn’t detected, you may need to enter bootloader mode to force-detect it

Entering bootloader mode (Trezor Safe 5 / Model T):

Hold the touchscreen while connecting the USB cable. The bootloader screen appears — Trezor Suite should then detect it.

Entering bootloader mode (Trezor Model One):

Hold both side buttons while connecting. Release when the bootloader screen appears.

Fix 9: Use a Different Browser (for Web Interface)

If you’re using the Trezor web wallet instead of the desktop app:

Use Chrome or Brave — best WebUSB/WebHID support
Firefox and Safari have limited hardware wallet support
Make sure Trezor Bridge is running

Still Not Working?

If none of the above resolves the issue:

Visit trezor.io/support for live chat and ticket support
If the device is under warranty (2 years), Trezor will replace a defective unit
Use the Trezor Suite diagnostics tool: Settings → About → Diagnostics

Frequently Asked Questions

My Trezor screen turns on but Trezor Suite says “No device” — why?

Most likely: wrong USB cable (charge-only), missing Trezor Bridge, or a Trezor Suite update is needed. Check all three.

Trezor worked yesterday, doesn’t work today — what changed?

Possible causes: a Windows/macOS system update that affected USB drivers, Trezor Suite auto-update requiring a firmware match, or a cable failure. Start with a different cable and port.

Can I use Trezor without Trezor Suite?

Yes — for MetaMask and web3 dApps, Trezor connects via the browser directly. For firmware updates and initial setup, Trezor Suite is required.

My Trezor shows a screen but won’t respond to anything — is it broken?

Try holding the power/reset button for 10 seconds. If it doesn’t respond, enter bootloader mode (see Fix 8) and attempt a firmware reinstall via Trezor Suite.

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HodlGuide Editorial Team

The HodlGuide editorial team researches and tests crypto wallets and exchanges, documenting setup flows, fees and security practices so readers can choose the right tool for self-custody.

Tagged trezor, trezor suite, troubleshooting, usb