if you use IE for your web browser...goto TOOLS...then click on Windows Update... you will go to the right place...their system analyzes your windows install, and pops up a list of updates needed...you have the choice of installing them or not...

Humankind has not woven the web of life. We are but one thread within it.
Whatever we do to the web, we do to ourselves. All things are bound together.
All things connect......Chief Seattle, 1854