I failed to remove the update. Thanks to Registry Backup (www.tweaking.com (one shameless plug for this program) was able to restore the registry to the situation of april 10. Then I searched for new updates. And Windows Update told me which updates to re-install and this particular update wasn't (pre-)selected.
Hello: I noticed on Microsoft's e-mail update message that if the updates were installed automatically (with update settings preset to Automatically Update then) there was no need to uninstall the ones they recommended uninstalling except if they were manually installed. Please correct me if I am wrong. Thanks.
Also, I noticed cookies and past history are not removed in Google Chrome. Any clue would help. Thanks and have a great weekend.