# Blue screen: SYSTEM_THREAD_EXCEPTION_NOT_HANDLED (0x0000007E)

**Code:** `SYSTEM_THREAD_EXCEPTION_NOT_HANDLED` · **Category:** Windows · **Seen on:** Windows

A system thread hit an exception — caused by an incompatible or corrupted driver, typically graphics or network.

## Meaning

Often appears right after a Windows update or upgrade with an old driver. If it loops at boot, use Safe Mode to roll back the driver.

## Common causes

- Incompatible driver after upgrade
- Corrupt driver files
- Faulty hardware

## Quick fix

1. Safe Mode → roll back/uninstall the named driver
2. Install the manufacturer’s latest driver
3. sfc /scannow

## Detailed fix by platform

### Windows

1. 

```powershell
# Advanced startup → Troubleshoot → Startup Settings → Safe Mode
pnputil /enum-drivers > drivers.txt
```


## How to diagnose

1. **Driver** — What failed
2. **Timing** — After an update?

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Source: [WhatIsMyError](https://whatismyerror.com/errors/windows/system-thread-exception-not-handled)