[BUG] Cowork task window does not open on Windows — task shows "waiting for input" but clicking does nothing

[sunezapa]

Preflight Checklist

• I have searched existing issues and this hasn't been reported yet
• This is a single bug report (please file separate reports for different bugs)
• I am using the latest version of Claude Code

What's Wrong?

When a Cowork task is running and reaches a state where user input is required, the task appears in the Active tasks list and a Windows notification appears saying "Claude is waiting for your input." However, clicking the notification or clicking the task in the Active tasks list does not open any task window or conversation view. The taskbar icon turns orange but no window appears.

What Should Happen?

Clicking an active task or its notification should open a conversation/task window where the user can respond to Claude's question.

Error Messages/Logs

Steps to Reproduce

Open Claude Desktop on Windows, switch to Cowork tab
Select a folder (C:...) via "Project or folder"
Paste a multi-step task description and press Enter
Task appears under Active tasks and starts running
Windows notification appears: "Claude is waiting for your input"
Clicking notification → taskbar icon turns orange, no window opens
Clicking task in Active tasks list → no window opens

Killing all claude.exe processes in Task Manager and restarting → same result, task gone from history

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

No response

Claude Code Version

Version 1.15962.1 (1e236d)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Other

Additional Information

This is a Claude Desktop Cowork bug, not a Claude Code CLI issue. I am not using a terminal. The Cowork task was started via the Cowork tab in Claude Desktop on Windows 10. Gmail MCP connector was active. The folder selected was a local Google Drive sync folder.

[github-actions]

Found 3 possible duplicate issues:

1. [BUG] Cowork (Windows): Sessions complete with cycle_health: 'healthy' but had_first_response: false — response never renders in UI #62266
2. [BUG] First-time Dispatch never connects on Windows 11 — messages send but no response renders, mobile "failed to load sessions #71739
3. [BUG] freezing UI #69751

This issue will be automatically closed as a duplicate in 3 days.

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🤖 Generated with Claude Code

[sunezapa]

This appears related to #62266 (closed as stale, not fixed).
Key finding from my testing: a minimal task ("write hej verden to test.txt")
completes successfully and the file is written to disk correctly — confirming
the execution layer works. The failure is purely in the UI: the task window
never opens and no response is ever rendered, matching the had_first_response: false
pattern described in #62266.

Windows 10, Claude Desktop v1.15962.1 (1e236d), Anthropic API.

[shahrzad-shariat]

Looking for a solution for this issue, please.

[adrianocaranzano]

Me too, I spent different time on it with a friend today without being able to solve it!

[sergio4]

Hello, I am going crazy with this problem as well. Any solutions or ideas?

[sunezapa]

Workaround, kind of: Make the script work without any user response... Eventually "communicate" by letting the code write to text file.. But not really a good workaround... tirs. 30. jun. 2026, 17.48 skrev sergio4 ***@***.***>:

…

*sergio4* left a comment (anthropics/claude-code#71780) <#71780 (comment)> Hello, I am going crazy with this problem as well. Any solutions or ideas? — Reply to this email directly, view it on GitHub <#71780?email_source=notifications&email_token=ACKCLUWFULEFVBHXI5WLAEL5CPONZA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTIOBUGUZTSOJUGU4KM4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KYZTPN52GK4S7MNWGSY3L#issuecomment-4845399458>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ACKCLUST34R7KURANYTE5435CPONZAVCNFSNUABFKJSXA33TNF2G64TZHM4TGNZSGUZTINZVHNEXG43VMU5TINZVG44TKNRQGYZ2C5QC> . Triage notifications, keep track of coding agent tasks and review pull requests on the go with GitHub Mobile for iOS <https://github.com/notifications/mobile/ios/ACKCLUX6MY2WAWNDFGEQQCL5CPONZA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTIOBUGUZTSOJUGU4KM4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KUZTPN52GK4S7NFXXG> and Android <https://github.com/notifications/mobile/android/ACKCLUWIGJLFNDI3GM55ZQ35CPONZA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTIOBUGUZTSOJUGU4KM4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2K4ZTPN52GK4S7MFXGI4TPNFSA>. Download it today! You are receiving this because you authored the thread.Message ID: ***@***.***>

[sergio4]

Reproduced on Intel Arc 130V "Lunar Lake" (Copilot+ PC), Windows 11, Smart App Control=evaluation, Memory Integrity=on. The Cowork task window is created at valid on-screen coords (240,76, 800×600) but stays IsWindowVisible=False — never shown. Renderer consistently logs blink.mojom.WidgetHost: Message 0 rejected by interface plus a CSP base-uri 'none' violation and claude.buddy/BuddyBleTransport reportState: No handler registered (see unknown-window.log). Ruled out (no effect): --disable-gpu, --disable-features=CalculateNativeWinOcclusion, --no-sandbox, --use-angle=gl, --disable-features=IsolateOrigins,site-per-process. Same app version (1.15962.x) works on a Dell XPS 15 (different GPU). The task-window renderer never initializes its WidgetHost, so the BrowserWindow never leaves show:false

[adrianocaranzano]

Actually I'm new to GitHub and I have no technical background, I found this BUG while I was looking for any solution for this problem on google...why is the bug described here with comments from users, instead of being handled from Anthropic?

[sergio4]

Seems that the problem has been solved now.

I got an updated for Claude Desktop App, then I had this message "Missing HCS Services: HNS, vmcompute, vfpext". It might be linked to Windows 11 Pro (probably).

Then I asked Claude Code to solve that issue. The fix is ​​to enable two Windows 11 Pro features: Hyper-V (provides vmcompute + vfpext) and Containers (provides HNS).

Then I restarted the computer and it worked. Hope it helps!

[shahrzad-shariat]

I also have no technical background, tried asking claude to fix the issue as Sergio suggested "Missing HCS Services: HNS, vmcompute, vfpext" (eventhough I never received that notification from Claude - for me, it's just not opening my cowork task as described above). Anyway, long story short, I unsubscribed and requested a refund! Hope you guys have a better luck at fixing the issue :)

[github-actions]

Closing for now — inactive for too long. Please open a new issue if this is still relevant.