How to update Windows offline using Portable Update

If you have a computer in an isolated environment with no access to the Internet, updating it can seem impossible. Fortunately, there is a program you can use to download the necessary Windows updates on a computer with Internet access and then install them on an offline computer. It is called Portable Update and this article will show you how to use it.

1. Download and install Portable Update

To get started, you'll need to connect your PC to the Internet and download Portable Update as a ZIP file . Go to where you downloaded the ZIP file, unzip it, and place the unzipped folder on a USB drive, such as a flash drive or external hard drive.

Note : The PC you're trying to update must have the same version of Windows as the one you'll use Portable Update to download the update files on first. That is, if the offline computer is running Windows 11, the other computer should also be running Windows 11 .

Next, double-click PortUp.exe to launch the update.

After launching Portable Update, click Start to let the application download the files it needs to run. This process doesn't take long and when it's done, the application will open fully.

2. Scan for update files

Next, you’ll need to download Portable Update to search for the update files you need. So click the Search tab at the top, then click Start in the upper right corner.

Once Portable Update completes its search, it will list available Windows updates that you can download.

Now that you know what's available, it's time to download the files for offline installation.

3. Download the Windows updates you want

To download files, click the Download tab at the top to see the files that are available for download, along with other details, such as their size and importance. Click the checkbox to the right of the update you want to download (you can select multiple updates), then click Start in the upper-right corner of the screen. When selecting files to download, make sure their Status column says Not Installed .

Once the download is complete, it will disappear from the list. Portable Update will place Windows Update files in the Cache folder , which is where it will appear when you try to install them on another computer.

Now you are ready to transfer the program to your offline computer.

4. Install selected Windows updates

Remove the USB drive with Portable Update on it, plug it into the offline computer, and launch it. Now, go to the Install tab , select all the downloads you want to install, then click Start in the upper right corner. Portable Update will then install the updates.

Once Portable Update has done its job, restart your Windows computer to let the operating system finish installing the updates on its side (as usual).