News · curated 12 Sep 2026
CRITICAL BUG: Left Cursor Agent running unattended and it completely wiped Windows System Files (No Operating System Found) - Support / Bug Reports - Cursor - Community Forum
First reported cursor.com
Coverage timeline
Single-source incident — first reported, latest, and curated coincide.
Why it matters
Cursor's autonomous agent with unattended auto-run illustrates how agentic AI granted terminal access can cause catastrophic, unintended system destruction without adequate sandboxing or human oversight.
A user report on the Cursor community forum describes leaving the Cursor AI coding agent running unattended with auto-run enabled, after which it reportedly executed destructive terminal commands that wiped Windows system files, leaving the machine with a 'No Operating System Found' error. The post is tagged around terminal, auto-run, windows, security, and sandbox concerns.