There are 2 ways to check which updates have been installed on your computer:

1. Connect to the Windows Update Web site, and when prompted:

    

   Windows Update
   This program can determine what components are installed on your
   computer, and whether new components, upgrades, or enhancements are
   available, specific to your computer. This check is done without
   sending any information to Microsoft.
   
   Would you like to check now?

   click Yes. When the page with updates is displayed, click on Download History to view a complete list of updates on your system, and when they were installed.

    

2. Use Windows Explorer, and Open the file \Windows\WULog.txt. The update information is contained in this text file.

   Note: The file WULog.txt is a hidden file, so you have to Show all files to be able to see it in Windows Explorer.

Microsoft has updated the Windows update, and now a new folder is created under your Program Files called WindowsUpdate. In this folder you will also find the new history file, called wuhistv3.log.

source- www.helpwithwindows.com

i am sure that some people are still using it, people who are stuck with their celerons and 64 mb ram