Windows Update does most of the heavy lifting automatically — but it does not do everything. There are situations where you need to find, download, and install a specific Windows update manually. Maybe your PC cannot connect to Windows Update. Maybe you need to deploy an update across multiple machines. Maybe Windows Update skipped a patch you specifically need, or you want to roll back a bad one.
The Microsoft Update Catalog is the tool for all of these situations. It is a searchable database of every update, driver, and patch Microsoft has ever released for Windows — and once you know how to use it, it is one of the most useful troubleshooting resources available.
This guide explains exactly what it is, how to use it step by step, and how to fix the errors that trip people up.
What Is the Microsoft Update Catalog?
The Microsoft Update Catalog is a website run by Microsoft at catalog.update.microsoft.com that hosts every update, hotfix, driver, and patch Microsoft has released for Windows and other Microsoft products.
Unlike Windows Update — which automatically decides what your PC needs and installs it — the Catalog lets you search for any specific update by its KB number, name, or description, and download the installer file directly to your computer.
This makes it useful in several situations that Windows Update cannot handle on its own.
You need to update a PC with no internet access. Download the update file on a connected machine and transfer it via USB.
You need to deploy the same update across multiple computers. Download once, install everywhere — no repeated downloading.
Windows Update skipped an update you need. Sometimes specific updates do not reach every machine through Windows Update due to compatibility checks. The Catalog lets you download and install them manually.
You want to roll back a bad update. Knowing which KB number caused a problem lets you find and uninstall it precisely.
You need a specific driver. The Catalog includes drivers for hardware components — useful when the manufacturer’s site is unhelpful or when you need an older driver version.
You are an IT administrator. The Catalog is essential for managing updates across enterprise environments where individual machines cannot connect directly to Microsoft’s servers.
How to Access the Microsoft Update Catalog
Open any modern web browser and go to:
catalog.update.microsoft.com
The site works in Chrome, Firefox, Edge, and other modern browsers. An older version of the site required Internet Explorer and an ActiveX plugin — that requirement was removed in 2016. If you are on a modern browser and the site loads slowly or behaves oddly, try a different browser before troubleshooting further.
No login or Microsoft account is required to use the Catalog. It is a public resource.
How to Find the Update You Need
Method 1 — Search by KB Number
Every Windows update has a unique KB number — a string beginning with “KB” followed by several digits, such as KB5034441. This is the most precise way to find a specific update.
Step 1 — Get the KB number
If you know which update you need, you already have the KB number. If you are looking for the most recent security update or a specific patch, check the Windows Update history on a machine that already has it installed — go to Settings, Windows Update, Update History, and find the KB number there. Microsoft also publishes monthly KB numbers for Patch Tuesday updates on the Microsoft Security Response Center blog.
Step 2 — Enter the KB number in the Catalog search box
Go to catalog.update.microsoft.com, type the KB number in the search box at the top, and press Search or Enter.
Step 3 — Review the results
The results will show multiple versions of the update — for different Windows versions, processor architectures, and sometimes languages. The columns show the title, product, classification, last updated date, version, and size.
Method 2 — Search by Name or Description
If you do not have a KB number, you can search by a descriptive term. For example:
“Cumulative Update Windows 11 2026” returns all recent cumulative updates for Windows 11.
“Intel graphics driver” returns graphics driver packages Microsoft has distributed.
“Security Update .NET Framework” returns security patches for .NET.
Results from keyword searches are less precise than KB searches and will return more entries to sort through, but they are useful when you know what you need but not the specific identifier.
How to Read the Search Results
The results table has several columns worth understanding before you download anything.
Title — The full name of the update, including the Windows version and KB number it addresses.
Product — Which Microsoft product the update applies to — Windows 11, Windows 10, Windows Server, Office, and so on.
Classification — The update type: Security Update, Critical Update, Driver, Service Pack, or Feature Pack.
Last Updated — When the update entry was last modified in the Catalog. This is not the same as when the update was originally released.
Version — The specific version number of the update package.
Size — The download size.
Download — The button to download the update package.
Before downloading, verify that the Title shows the correct Windows version for your machine and that the architecture matches — x64 for 64-bit Windows, x86 for 32-bit, ARM64 for ARM-based devices like Surface Pro X.
How to Download and Install an Update
Step 1 — Click Download
Find the correct update in the results table and click the Download button on the right side of the row. A small popup window will open showing a download link.
Step 2 — Click the link in the popup
The popup shows a direct link to the update package. Click it to download the file. The file will typically be a .MSU file for Windows updates or a .CAB file for some driver packages.
Step 3 — Close the popup and run the installer
Once downloaded, close the Catalog browser window. Navigate to your Downloads folder and double-click the .MSU file to run the update installer.
Step 4 — Follow the installation prompts
The Windows Update Standalone Installer will open. Click Yes to accept the license terms if prompted. The installer will check compatibility, apply the update, and may require a restart to complete.
Step 5 — Verify installation
After the computer restarts, go to Settings, Windows Update, Update History, and confirm the KB number appears in the installed updates list.
Installing on an Offline Computer
If you downloaded the update on a different computer and transferred it via USB, the installation process is the same — double-click the .MSU file on the offline computer and follow the prompts.
For .CAB files, the installation is slightly different. Open Command Prompt as administrator and run:
dism /online /add-package /packagepath:"C:\path\to\update.cab"Replace the path with the actual location of your .CAB file.
Common Errors and How to Fix Them
Catalog Website Not Loading or Extremely Slow
What causes it: Server-side load issues, browser compatibility problems, or outdated browser cache.
Fix: Clear your browser cache and try again. If that does not work, try a different browser. Chrome and Edge both work reliably with the current version of the Catalog site.
Download Button Opens a Blank Popup
What causes it: Popup blockers preventing the download link window from appearing.
Fix: Allow popups for catalog.update.microsoft.com in your browser settings. In Chrome, go to Settings, Privacy and Security, Site Settings, Pop-ups and redirects, and add catalog.update.microsoft.com to the allowed list. In Edge, go to Settings, Cookies and Site Permissions, Pop-ups and redirects, and add the site there.
Error 0x80070002 When Installing a Downloaded Update
What causes it: The update file was corrupted during download, or a required component is missing on the target machine.
Fix: Delete the downloaded file and download it again from the Catalog. If the error persists, run the Windows Update Troubleshooter — go to Settings, System, Troubleshoot, Other troubleshooters, and run Windows Update. Then try installing the downloaded update again.
Update Shows in Catalog But Cannot Be Downloaded
What causes it: Some older updates in the Catalog have been superseded or retired and their download links no longer function.
Fix: Check whether a newer cumulative update supersedes the one you were trying to download. Cumulative updates on Windows 10 and Windows 11 include all previous updates — installing the most recent cumulative update will include the content of older updates that are no longer directly downloadable.
Update Installs But Shows Error on Restart
What causes it: A conflicting update already installed, missing dependencies, or a corrupted system component.
Fix: Run System File Checker — open Command Prompt as administrator and run sfc /scannow. Wait for the scan to complete. Then run DISM — dism /online /cleanup-image /restorehealth. Restart the computer and try the update installation again.
Cannot Find the Update I Need
What causes it: Searching with the wrong KB number, wrong product, or looking for an update that has been retired.
Fix: Verify the KB number from Microsoft’s official documentation or Windows Update history. Check that you are searching for the correct product — an update for Windows 10 will not show under Windows 11 results. If the update was superseded, it may have been removed from the Catalog — look for the superseding cumulative update instead.
Downloaded Update Says “Not Applicable to Your Computer”
What causes it: Downloaded the wrong architecture version (x64 vs x86), wrong Windows version, or the update was already installed.
Fix: Go back to the Catalog and verify that the update title matches your Windows version exactly — check Settings, System, About to confirm your Windows version and whether it is 64-bit or 32-bit. Download the correct version.
Windows Update Pushed a Bad Update — How to Use the Catalog to Fix It
This is one of the most practical use cases for the Catalog — and it connects directly to something many users have experienced.
When Windows Update automatically installs an update that breaks something — a BIOS update that causes a boot loop, a driver update that stops hardware working, a security patch that conflicts with specific software — the Catalog lets you find the exact KB number and uninstall it precisely.
As we covered in the HP BIOS update failed guide, one of the most common causes of HP All-in-One BIOS failures is Windows Update automatically pushing a BIOS firmware package that is incompatible with specific hardware variants. Knowing the KB number of the problematic update is the first step to resolving it — and the Catalog is where you verify exactly what was pushed.
Similarly, the ASUS ROG BIOS update guide notes that Windows Update can push BIOS updates automatically. If you need to find the specific package that was pushed or download an alternative version to recover from a failed update, the Catalog is where you get it.
To uninstall a problematic update:
Go to Settings, Windows Update, Update History, Uninstall Updates. Find the KB number in the list and click Uninstall. If the update is not showing in the Uninstall list — which can happen with BIOS and driver updates — use the Catalog to find the specific package and follow Microsoft’s documentation for that update type to reverse it.
Using the Catalog for Drivers
The Microsoft Update Catalog includes driver packages for many hardware components — graphics cards, network adapters, storage controllers, and others. These are the same driver packages Windows Update distributes automatically, but the Catalog lets you download them manually.
This is useful when a driver update through Windows Update caused problems and you want to download an older version, or when a specific driver version is not being offered through Windows Update for your hardware configuration.
Search for the driver by hardware manufacturer and component type — for example, “Intel Wi-Fi driver” or “Realtek audio driver” — and filter results by date to find older or newer versions.
For a broader understanding of how firmware and driver updates interact with your hardware, our guide on why BIOS updates are safer than most people think covers the precautions worth taking before updating any low-level system component — the same logic applies to drivers downloaded from the Catalog.
Tips for Using the Catalog Effectively
Always note the KB number before searching. Keyword searches return too many results to navigate efficiently. Get the KB number from Windows Update history or Microsoft’s documentation first.
Check the Last Updated date. An update marked as last updated recently may have been revised — the revision note will appear in the update details page if you click the title.
Download to a labelled folder. If you are managing updates for multiple machines, create a folder with the KB number as the name so you can easily identify what you have downloaded.
Verify the file hash after downloading. For security-sensitive deployments, Microsoft publishes SHA-256 hashes for update packages in the update details page. Verify the hash matches before installing.
Bookmark the Catalog. catalog.update.microsoft.com is worth bookmarking alongside your other diagnostic tools — it is the authoritative source for every update Microsoft has ever released.
If you have been dealing with more complex firmware update problems — like the BIOS firmware update B07 errors that affect multiple manufacturers — the Catalog is often the starting point for finding the correct recovery package, since the KB number in the error message maps directly to a downloadable file in the Catalog.
Frequently Asked Questions
What is the Microsoft Update Catalog?
The Microsoft Update Catalog is a website at catalog.update.microsoft.com that hosts every update, hotfix, driver, and patch Microsoft has released for Windows and other Microsoft products. It allows you to search for and download specific update packages manually, rather than relying on Windows Update to deliver them automatically.
Do I need a Microsoft account to use the Update Catalog?
No. The Microsoft Update Catalog is a public resource that does not require a login or Microsoft account.
What browsers work with the Microsoft Update Catalog?
The current version of the Catalog works in all modern browsers including Chrome, Firefox, and Edge. The older version required Internet Explorer with an ActiveX plugin, but that requirement was removed in 2016.
What is a KB number?
KB stands for Knowledge Base. Every Microsoft update is assigned a unique identifier beginning with “KB” followed by several digits — for example, KB5034441. This identifier is the most reliable way to find a specific update in the Catalog and to verify that a particular update is installed on your machine.
How do I find the KB number of an update I need?
Check Windows Update History on a machine that already has the update installed — go to Settings, Windows Update, Update History. Microsoft also publishes monthly KB numbers for security and cumulative updates on the Microsoft Security Response Center website.
Can I use the Microsoft Update Catalog to install updates on offline computers?
Yes. Download the update package on any internet-connected computer, transfer it to the offline computer via USB drive or network share, and run the installer directly. This is one of the most common use cases for the Catalog in enterprise environments.
Why does the Download button not work?
The most common cause is a popup blocker preventing the download link window from opening. Allow popups for catalog.update.microsoft.com in your browser settings. In Chrome, go to Settings, Privacy and Security, Site Settings, Pop-ups and redirects, and add the Catalog site to the allowed list.
Can I download drivers from the Microsoft Update Catalog?
Yes. The Catalog includes driver packages for many hardware components distributed through Windows Update. You can search for drivers by manufacturer and component type and download specific versions, including older versions that are no longer being offered through automatic Windows Update.
