[ This article is posted at ElMajdal.Net website : http://elmajdal.net/Win7/How_To_Check_If_Service_Pack_One_For_Windows_7_Is_Installed_Or_Not.aspx]

Before downloading and installing SP1 for Windows 7, you need to check if it is already installed or not. In this article, I will be showing you two methods to verify if SP1 is installed or not. To check if Windows 7 SP1 is already installed, follow the below steps:

  1. Click the Start button Picture of the Start button, right-click Computer, and then click Properties.

  2. The basic information about your computer page will open

  3. If Service Pack 1 is listed under Windows edition, SP1 would be already installed on your computer.

    For example, in the below snapshot, you can see that Windows 7 SP1 is not installed, as the Windows edition is only Windows 7 Ultimate

    After Windows 7 SP1 is installed, it will be displayed as :


You can also know if SP1 is installed by using winver

  1. Click the Start button Picture of the Start button, and inside the Search programs and files textbox, type winver and then click on winver.exe

  2. The About Windows page will open.

    The below snapshot is for a Windows 7 without SP1

    whereas this one is for Windows 7 with SP1, as you can see its now Build 7601


In this article I have shown you two different methods to check if SP1 for Windows 7 is already installed or your system or not. Doing so, will make you decide whether SP1 for Windows 7 is required or not.