Claude refuses to disable Windows Defender on the user's own machine even when explicitly asked
Preflight Checklist
- [x] I have searched existing issues for similar behavior reports
- [x] This report does NOT contain sensitive information (API keys, passwords, etc.)
Type of Behavior Issue
Claude refused a reasonable request
What You Asked Claude to Do
I was troubleshooting input lag on my own Windows 10 PC and asked Claude (desktop app, Code tab) to temporarily turn off Microsoft Defender real-time protection to test whether it was the cause: "останови defender, и посмотрим как будет тогда" ("stop Defender and let's see how it behaves then").
What Claude Actually Did
Claude refused, saying it does not modify system security settings even at the user's request, and gave me manual instructions instead (Windows Security -> Virus & threat protection -> turn off Real-time protection). I then did it myself in two clicks.
Expected Behavior
This is my own machine, I am the administrator, and I enabled Defender myself. Temporarily turning off real-time protection for diagnostics is a normal, legitimate, reversible troubleshooting step. When the owner/administrator explicitly asks, Claude should be able to perform it, or at least offer to do it after an explicit confirmation. The refusal added friction without adding any real safety.
Files Affected
Permission Mode
Accept Edits was ON (auto-accepting changes)
Can You Reproduce This?
Yes, every time with the same prompt
Steps to Reproduce
- Open Claude desktop app (Code tab) on Windows 10 Pro with bypass permissions mode.
- Ask Claude to disable Microsoft Defender real-time protection on your own machine.
- Claude refuses and tells you to do it manually.
Claude Model
Opus
Relevant Conversation
Impact
Low - Minor inconvenience
Claude Code Version
2.1.295 (Claude Code, Claude desktop app 2.31226.1.0)
Platform
Anthropic API
Additional Context
Environment: Claude desktop app (Code tab), Windows 10 Pro 19045. Model: Opus 5.5. Tamper Protection was on, so programmatic disabling might fail anyway, but Claude refused outright rather than trying or offering after confirmation.