Windows 7 Ultimate Installer

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Support for Windows 7 ended on January 14, 2020. We recommend you move to a Windows 11 PC to continue to receive security updates from Microsoft.

The recommended (and easiest) way to get SP1 is to turn on automatic updating in Windows Update in Control Panel and wait for Windows 7 to notify you that SP1 is ready to install. It takes about 30 minutes to install, and you'll need to restart your computer about halfway through the installation.

To check if Windows 7 SP1 is already installed on your PC, select the Start button, right-click Computer, and then select Properties.

If Service Pack 1 is listed under Windows edition, SP1 is already installed on your PC.

You’ll need to know if your PC is running a 32-bit (x86) or 64-bit (x64) version of Windows 7.


Select the Start button, right-click Computer, and then select Properties.


The version of Windows 7 is displayed next to System type.


Check to make sure your PC has enough free disk space to install SP1.


Installation method. Estimated amount of free disk space needed.


x86-based (32-bit): 750 MB. x64-based (64-bit): 1050 MB.

Downloading SP1 from the Microsoft website.

x86-based (32-bit): 4100 MB. x64-based (64-bit): 7400 MB.

It’s a good idea to back up your important files, photos, and videos to an external hard disk, USB flash drive, or the cloud before installing the update. Make sure your PC is plugged in to power and you’re connected to the Internet.

Some antivirus software might prevent SP1 from installing or slow down the installation.

You can temporarily disable your antivirus software before the installation.

If you do so, make sure you’re aware of the risks that might be involved and re-enable the antivirus software as soon as SP1 is done installing.

If your PC is set to automatically install updates, you’ll be prompted by Windows Update to install SP1.

Follow the instructions to install the update.