Instead of just guessing what these updates might be, it would be better to check the KB number of which updates were actually installed to see what they are. Only Sandy can do that.
- Open Control Panel, then "Add or Remove Programs"
- On the top right, select the Show updates check box. All installed updates appear at the top of your program list.
- Check the dates the updates were installed and get the KB numbers of the ones that were just installed. It may take a while for the list to populate (on one of my computers it takes several minutes, but it eventually gets there).
- Once you have the KB numbers, list them here so we can look them up
Microsoft is still making security updates for XP, but only for companies that pay them lots and lots of money for continued support.
For most people, Microsoft is still providing updates for Microsoft Security Essentials, MS Office and other MS products, and the Malicious Software Removal Tool. There was also a patch for IE, versions 6 through 11.
http://steve.grc.com/2014/04/28/a-quick-mitigation-for-internet-explorers-new-0-day-vulnerability/It could be that the updates are for those, but there's only one way to find out -- check the KB numbers of the updates.