roll back, how where ??

how to do a roll back i cant find it
i want to undo the last update to check if that is causing me my dongle issue
http://www.steinberg.net/forums/viewtopic.php?f=226&t=73409

in configuration go to remove program
click the tab “show installed updates”
and remove the update.

http://www.sevenforums.com/tutorials/24367-windows-update-view-update-history-details.html

kind regards,
R.