I bought a Macbook, my first mac, and I'm absolutely loving it! However there are several apps that refuses to install on my Macbook. I searched the forums but couldn't find the answer (if I didn't search hard enough, sorry).
I downloaded stuffit expander the other day and double clicked where it said "double click to install" (duh), the installer showed up on the dock for half-a-second and disappeared. Nothing happened. I tried it again and the same results. I restarted the computer, tried installing again and the again, nothing happens. The same thing happens for sketchup and other applications I can't remember.
Also several apps, even apps that Apple had pre-installed, doesn't run! One such application is Activity Monitor. Shows up in my dock for half-a-second, disappears and nothing happens.
Did I do something to my computer that screwed everything up? Did I delete something on accident? I'm also on a long trip to Japan and I happend to forget the install disk back in the US. YES THAT WAS STUPID OF ME

. Is there anything I can do without the install disk?
Thanks for all your help, oh and this forum rocks!!
