Problem installing programs
I have downloaded two programs, Adobe Flash Player 10.0.32.18, and Paintbrush 2.0.1, both from the Apple website. The download of the programs appears to work, and in both cases icons appear on the main screen. In the case of Adobe Flash Player, I double clicked the icon and went through the installation procedures, and at the end of this the window told me that the installation was successful. However, it is as if this installation never happened, as nothing was different to before I double clicked the icon to install in the first place. Double clicking the icon again just repeated the installation process again. Installation did nothing. In the case of Paintbrush, a window told me to drag the icon into my applications folder and follow the on screen procedures. Dragging Paintbrush into my applications folder did nothing apart from putting a "blank sheet of paper" icon labelled Paintbrush in the applications folder. Double clicking this icon just opened up the window telling me to drag the icon into the applications folder again. Again, installation simply did not happen.
My computer simply does not seem to want to install downloaded programs. No error messages appear or anything, you just follow the instructions and keep going round in circles. Telephoning AppleCare was of no use, and they were unable to diagnose or solve my problem. Can anybody help me?
MacBook Pro, Mac OS X (10.6.1)