Claude Cowork on Windows: Setup, Fixes and 3 Real Tests

Originally published on khadim.tech.

In short: Claude Cowork comes with the Claude desktop app for Windows and needs a paid plan (Pro is $20 a month). Install the app and say yes to the administrator prompt, or it installs without Cowork. Then switch the message box to Cowork, connect a folder and type what you want. On my laptop it sorted 47 messy files into 11 folders in about 30 seconds, renamed 14 scanned PDFs correctly and found 9 duplicate photos by their contents, without deleting anything. If it won't start with missing HCS services, turn on Windows' Virtual Machine Platform and restart.

Claude Cowork lets Claude work on the files on your PC: you connect a folder, type what you want in plain English, and it sorts, renames and checks files for you. I tested it on a Windows 11 laptop on 10 November 2026, with Claude Desktop 4.23118, for my YouTube channel Khadim Labs. I gave it three jobs people actually have: a messy Downloads folder, a pile of badly named printer scans, and a photo folder full of copies. Then I checked every result on disk myself instead of trusting Cowork's summary. The files were made up for the test.

What is Claude Cowork?

Cowork is Claude's agent mode inside the Claude desktop app. In a normal chat Claude answers you; in Cowork it carries out a task, step by step, on files in the folders you give it. Anthropic's getting started guide says "Claude can only read and write files in folders you've connected." You don't need a terminal or any code, which is the main difference from Claude Code.

Is Claude Cowork free? Which plans include it?

No. "Cowork is available to paid Claude plans (Pro, Max, Ultra, Team, Enterprise) only," according to Anthropic. These were the individual plans on claude.com/pricing on 10 November 2026:

Team and Enterprise plans include it too, and their admins can switch it off for the organization. Anthropic says usage across claude.ai, Claude Code and Claude Desktop counts toward the same limit, so Cowork shares your plan's allowance.

What you need to run Cowork on Windows

From Anthropic's Windows deployment guide and its Windows checklist:

• A paid Claude plan.
• Windows 10 or 11. Devices in Windows S mode can't run Claude Desktop.
• At least 8 GB of memory and about 20 GB of free space on the drive that holds %LOCALAPPDATA%, where Cowork keeps its workspace. Anthropic says Cowork still starts with less memory, "but tasks run slowly."
• Windows' Virtual Machine Platform feature, and virtualization turned on in your PC's firmware.
• Administrator approval during the install.

It won't run inside a virtual machine unless that machine supports nested virtualization. My usual Windows test VM couldn't run Cowork, so I filmed everything on the laptop itself.

How to install Claude Cowork on Windows

1. Download the Claude desktop app from claude.com/download. There's no separate Cowork download; it's part of the app.
2. Run the installer and click Yes on the Windows administrator prompt. Without administrator rights, Anthropic says, you "can still install Claude, but Cowork on desktop will not be available."
3. Sign in with your Claude account.
4. In the message box, switch from Chat to Cowork.
5. The first time, the app showed a banner, "Get set up for agent mode", with a Download button. That's a one-time package for Cowork's workspace. On my laptop the banner closed straight away and the package downloaded in the background.

IT teams can deploy the MSIX package instead; Anthropic's guide has the commands, and it also needs an administrator install for Cowork.

How to use Claude Cowork: connect a folder

Cowork only sees folders you connect, so that comes first:

1. In the Cowork message box, open Project or folder and choose Add folder.
2. Pick the folder in the Windows folder picker. Connect the folder you want it to work on, not your whole user folder.
3. Read the box that appears. It asks whether to let Claude change files in that folder:

The permission box Cowork shows when you connect a folder (Claude Desktop 4.23118).

Note what you're agreeing to: Claude "can edit, delete, and share these files with connected tools." I clicked Allow each time and didn't test Always allow. After that, Cowork didn't stop to ask again while it moved and renamed files.

1. Type your request in plain English and send it. A new task (Ctrl+N) keeps the folders from the last one, so check which folders are attached before you send.

Test 1: organize a messy Downloads folder

The folder had 47 files: photos, screenshots, invoices, a boarding pass, zip files, notes, and seven "(1)" copies of other files. I typed:

This is my Downloads folder and it's a total mess. Sort everything into folders that make sense, put exact duplicates into a Duplicates folder, and don't delete anything.

About 30 seconds after I sent it, Cowork answered:

47 files into 11 folders, nothing deleted, 7 copies set aside after comparing contents.

What I found when I checked the folder myself:

• All 47 files were there, in 11 folders (three of them nested under a Documents folder), with nothing left loose.
• The seven "(1)" files were in Duplicates. Cowork said it "compared file contents to confirm each one was an exact copy."
• It kept the two Q3 marketing reports, "final" and "final v2", apart because they "have different contents."
• It left a _sort-log.txt listing every move, "in case you want to find or undo anything." I didn't ask for that, and it's the most useful thing it did.

One catch: on an earlier run with the same 47 files, it chose 9 folders instead of 11. Same files, different scheme. If you care about the folder names, put them in the request.

Test 2: rename scanned PDFs automatically

Fourteen printer scans called Scan_0001.pdf to Scan_0014.pdf: receipts, invoices, a lease, a payslip, a bank statement. I typed:

These are scans from my printer and the file names are useless. Rename each one so I can tell what it is: the date, the company, and the type of document. Don't change what's inside the files.

About 30 seconds later every file had a name like 2026-07-07_Maple-Court-Properties_Lease-Agreement.pdf:

All 14 scans renamed date_company_type, plus a note about one bill that didn't add up.

I checked all 14 names against the text inside each PDF: the date, company and document type were right for every one, and each file's checksum matched the original, so the contents were untouched. Cowork's own answer said the same: "A checksum taken before and after confirms the contents weren't changed."

Cowork also flagged something I hadn't asked about: "One thing to check: the Brightwave Energy bill is dated August 25, 2026, but the line item says 'Electricity, October.'" That mismatch was real in the test file. It used the printed date and asked me to check, which is what I'd want an assistant to do.

Test 3: find duplicate photos by content

Thirty photos, some saved twice under other names ("Copy of", "(1)", a WhatsApp name, "beach trip 5"). I typed:

Some of these photos are copies saved under different names. Find the duplicates by what's actually in the files, not by their names, and move the extra copies into a Duplicates folder. Don't delete anything.

9 copies found by a content hash in about 20 seconds, including one renamed "edited 8".

The 30 files held 21 different pictures, and it moved exactly the 9 extra copies, keeping one of each. It found them with "a fingerprint (hash) of each file's actual contents", so a file only counted if it was byte-for-byte identical. It spotted that "edited 8.jpg" is "exactly the same file as IMG_5151.jpg" (I checked: same hash). It was also upfront about the limit: "a photo that was resized or edited would still be in the main folder."

How long did each job take?

Chart: Cowork took 29 seconds to sort 47 files, 29 seconds to rename 14 scans and 18 seconds to find 9 duplicate photos
Seconds from sending the request to Cowork's answer, one run each.

My first run of the Downloads job, on the same 47 files, took about 80 seconds.

Claude Cowork not working on Windows? Fix "missing HCS services"

If Cowork won't start and shows an error like "Missing HCS services: HNS, vmcompute, vfpext", Anthropic's guide says the Virtual Machine Platform service stack isn't registered, even if Claude installed fine. The fix, from that guide:

1. Open PowerShell as administrator and check the feature:

   Get-WindowsOptionalFeature -Online -FeatureName VirtualMachinePlatform

1. If it isn't enabled, turn it on:

   Enable-WindowsOptionalFeature -Online -FeatureName VirtualMachinePlatform -All

1. Use Restart, not shut down and power on. Anthropic notes that with Fast Startup on, "a shutdown cycle can leave the virtualization services uninitialized."
2. If VMware or VirtualBox is installed, run bcdedit in an elevated prompt and check that hypervisorlaunchtype reads Auto. If not, run bcdedit /set hypervisorlaunchtype auto and restart.

To see which check fails, open Help > Troubleshooting > Show Logs in Claude Desktop and look at supported-features-info.json. And if Cowork isn't in the app at all, the usual cause is an install without administrator rights: reinstall and click Yes on the prompt.

Does Cowork run on your PC or in the cloud?

Anthropic's two help pages describe it differently. The getting started guide says "Cowork runs your tasks in the cloud. Claude's work runs on Anthropic's servers, in an isolated environment," and adds that tasks using your local files need the desktop app open. The Windows guide describes "a background service that runs Cowork's virtual machine" on the PC, which is why it needs the Virtual Machine Platform. My test only shows that it needed the app open and the Windows feature on; I can't tell from the outside where each step ran.

Is Claude Cowork safe for your files?

It's built to be careful, but it can still change real files, so start small. What protects you:

• It only works in folders you connect.
• Anthropic says "Claude requires your explicit permission before permanently deleting any files": a prompt where you choose Allow.
• The permission mode in the message box decides how often it asks. Manual pauses for approval; Auto keeps working and has Claude review each action, blocking anything it judges unsafe; Skip all approvals checks nothing. Anthropic lists Auto as the default on Pro, Max, Ultra and Team. For work with real consequences it suggests staying close or switching back to Manual. I ran these tests in Manual.

What I'd add from the tests: say "don't delete anything" in the request, try it on a copy of a folder first, and read the summary against the folder itself. Cowork was right every time here, but the 9-versus-11 folder runs show the result isn't fixed.

Claude Cowork vs Claude Code

Both use Claude models, but they do different jobs. Cowork is in the desktop app, works on connected folders and needs no terminal, so it suits file chores and documents. Claude Code is the coding agent you run in a terminal or editor; my Claude Code on Windows guide covers that setup, and the same paid plans include both.

If you want Cowork or a similar agent set up for your team's real files and workflows, that's part of my AI agent consulting.

FAQ

Is Claude Cowork free?

No. Anthropic says Cowork is available on paid plans only: Pro, Max, Ultra, Team and Enterprise. Pro is the cheapest at $20 a month, or $17 a month billed yearly, as of 10 November 2026. The free plan doesn't include it.

Is Claude Cowork included in Pro?

Yes. Pro is one of the plans Anthropic lists for Cowork. Anthropic says usage across claude.ai, Claude Code and Claude Desktop counts toward one limit, so Cowork shares your Pro allowance. On Team and Enterprise plans an admin can turn Cowork off for the organization.

Why is Cowork missing from the Claude desktop app on Windows?

The most common reason is an install without administrator rights. Anthropic's Windows guide says users without admin access can still install Claude, but Cowork on desktop will not be available. Reinstall from claude.com/download and approve the administrator prompt. Also check that you're on a paid plan and, on a work account, that your admin hasn't turned Cowork off.

How do I fix 'Missing HCS services' in Claude Cowork?

That error means Windows' Virtual Machine Platform isn't set up. Run Enable-WindowsOptionalFeature -Online -FeatureName VirtualMachinePlatform -All in an administrator PowerShell, then use Restart rather than shut down and power on. If VMware or VirtualBox is installed, check that bcdedit shows hypervisorlaunchtype Auto.

Can Claude Cowork delete my files?

Only in folders you connect, and not without asking. Anthropic says Cowork needs your explicit permission before permanently deleting any file, through a prompt where you choose Allow. In my three tests I asked it not to delete anything, and it moved files into new folders instead.

What is the difference between Claude Cowork and Claude Code?

Cowork lives in the Claude desktop app and works on the folders you connect, with no terminal, for jobs like sorting files and renaming documents. Claude Code is Anthropic's coding agent, used from a terminal or code editor. Both use Claude models and the same paid plans.

Disclosure: written with AI assistance, from my own recording and notes.