Running a uMBP 2.4 GHz C2D, Mac OSX 10.6.6. I get to a problem when installing programs these days, I noticed it on Microsoft Autoupdater and an update to Growl and i think a few others that i can't remember. Basically, i can go through all the panes on the installation menu, accepting the agreement, choosing install location, etc, but when it comes to hitting the install button, nothing happens. I click the button, it darkens it like it should, and then nada. Thoughts?