File Hippo is a great little program that can be set to quickly scan your computer when it turns on and let you know if you have any updates for software that did not notify you on it's own that there is a newer version available.
The automatic updates will get the Windows O/S and some other Microsoft applications up to date but it does of update most of the other software on your computer. It's best to be running both Windows automatic updates and File Hippo.