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33> Release notes for Claude Science, including new features, improvements, and bug fixes by version.
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5<Update label="0.1.48" description="September 14, 2026">
6 * On Windows, environment setup now handles user folders with accented or non-Latin names, tries again if Windows briefly refuses to start the environment installer, and no longer needs the Microsoft Visual C++ Redistributable
7 * The app now warns you a few days before your sign-in expires and offers a "Sign in again" button
8 * Various bug fixes and security improvements
9</Update>
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511<Update label="0.1.47" description="September 10, 2026">
612 * Claude Science is now available for Windows: download it from [claude.com/product/claude-science](https://claude.com/product/claude-science), and see [Get started](/docs/claude-science/get-started) for setup
713 * Various bug fixes and improvements
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8585* No browser tab appeared on macOS or Linux: on macOS, choose Open from the menu bar icon. On Linux, copy the printed URL into a browser on the same machine, or run `claude-science url` to print a fresh one.
8686* A Claude Science message on Windows says the app was not installed because the file could not be confirmed: the copy you opened still runs but isn't installed. Download the installer again from [claude.com/product/claude-science](https://claude.com/product/claude-science) and open the new file. If the message persists, the PC could not verify the publisher's signature, so ask your IT team.
8787* The Windows app reports that it couldn't set up the app window engine: the first launch downloads that engine from `downloads.claude.ai`, and this usually means the app couldn't reach it. Check the internet connection, and on a corporate network ask IT to allow that domain (see [Network requirements](/docs/claude-science/network-requirements)).
88* On Windows, environment builds or other features fail and the PC doesn't have the Microsoft Visual C++ Redistributable (x64): install the latest supported x64 version from [Microsoft's download page](https://learn.microsoft.com/cpp/windows/latest-supported-vc-redist), then quit Claude Science from its notification-area icon and open it again.
8988* Linux refuses to start: a sandbox dependency is missing (install bubblewrap and socat as shown in the Install section), too old, or blocked. Check your bubblewrap version with `bwrap --version`, then match the error message to its fix in the [Linux troubleshooting table](/docs/claude-science/run-on-remote-linux-server#troubleshooting).
9089* Projects from another computer don't appear: by design, Claude Science keeps your work on the computer where it's installed, so each computer starts with its own projects. Your earlier projects are still on the other computer. See [Use Claude Science on more than one computer](/docs/claude-science/multiple-computers).
9190* Sign-in stops at claude.ai: your account is on the Free plan (upgrade required), the redirect couldn't return (use Paste a code), or your Team or Enterprise organization hasn't [enabled Claude Science](/docs/claude-science/enable-claude-science) yet.
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1414Authentication tokens and the shared package environment live under the default data folder (`~/.claude-science/`, or `%USERPROFILE%\.claude-science\` on Windows) regardless of the data directory, so endpoint backup or wipe policies that target the data directory don't affect sign-in state.
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16On Windows, the program itself installs per user, without administrator rights, to `%LOCALAPPDATA%\Programs\ClaudeScience` and registers under the signed-in user's **Settings** > **Apps** > **Installed apps** rather than machine-wide. The app also writes launch logs and state to `%LOCALAPPDATA%\ClaudeScience` and keeps a sandbox state folder under `%LOCALAPPDATA%`, and it unpacks components it runs, such as the app window engine and the sandbox launcher, under the data folder, so allow-listing by path needs both the program folder and the data folder. Uninstalling removes the program and sandbox state; `claude-science uninstall --purge` also removes the data and state folders.
16On Windows, the program itself installs per user to `%LOCALAPPDATA%\Programs\ClaudeScience` and registers under the signed-in user's **Settings** > **Apps** > **Installed apps** rather than machine-wide. The app also writes launch logs and state to `%LOCALAPPDATA%\ClaudeScience` and keeps a sandbox state folder under `%LOCALAPPDATA%`, and it unpacks components it runs, such as the app window engine and the sandbox launcher, under the data folder, so allow-listing by path needs both the program folder and the data folder. Uninstalling removes the program and sandbox state; `claude-science uninstall --purge` also removes the data and state folders.
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1818Your endpoint tooling governs these folders the same way it governs any other local application data. Anthropic doesn't host a copy of these folders, so Custom Data Retention and Org Data Export don't reach them. [How Claude Science works with your data](/docs/claude-science/how-claude-science-works-with-your-data) covers what Anthropic does receive from the app, including the session transcripts available to Enterprise organizations with the Compliance API enabled.
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4646## Endpoint detection and response
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48Claude Science runs analysis code inside a local sandbox on the member's computer. On macOS, sandboxed analysis processes run as ordinary child processes and are visible to host-level EDR tools. On Windows, they run under the member's account inside a Windows AppContainer, the operating system's built-in app isolation, started by a sandbox launcher that ships inside the app, without WSL or Hyper-V. Installing and running need no administrator rights, and Windows asks once, optionally, for administrator approval so that Command Prompt scripts and git can run inside cells and PowerShell cells can change folders, while Python and R cells work without it. If security software holds the sandbox launcher or quarantines files in an analysis environment, Claude Science names the affected folder in its error message so you can add an exclusion. On Linux, sandboxed processes run inside a separate PID namespace with an isolated process view, so host-level EDR won't see them as ordinary children of the app.
48Claude Science runs analysis code inside a local sandbox on the member's computer. On macOS, sandboxed analysis processes run as ordinary child processes and are visible to host-level EDR tools. On Windows, they run under the member's account inside a Windows AppContainer, the operating system's built-in app isolation, started by a sandbox launcher that ships inside the app, without WSL or Hyper-V. Windows asks once, optionally, for administrator approval so that Command Prompt scripts and git can run inside cells and PowerShell cells can change folders, while Python and R cells work without it. If security software holds the sandbox launcher or quarantines files in an analysis environment, Claude Science names the affected folder in its error message so you can add an exclusion. On Linux, sandboxed processes run inside a separate PID namespace with an isolated process view, so host-level EDR won't see them as ordinary children of the app.
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5050## Required updates
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1818* macOS 13 or later (Apple silicon or Intel), Windows 11 (x64), or Linux x64 on a glibc-based distribution.
1919* About 5 GB of free disk space for the runtime and starter environments.
2020* On Linux: socat, bubblewrap 0.8.0 or later, and unprivileged user namespaces permitted by the kernel.
21* On Windows: the Microsoft Visual C++ Redistributable (x64), which some features depend on and most PCs already have. If yours doesn't, install the latest supported x64 version from [Microsoft's download page](https://learn.microsoft.com/cpp/windows/latest-supported-vc-redist).
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