Are you running Vista and can't get Adobe Reader to install? Well you aren't alone. It was recently listed as one of the top complaints regarding Vista. Fortunately, we have an answer to the issue. Actually, two answers!
First, unless you logged right into the administrator account, or you are a power user and have turned off User Access Control (UAC) you will need to turn it back on, then install Adobe. I would then recommend you leave UAC on for normal operations. To do this, go to Control Panel, click on User accounts, then click on the setting to turn UAC on. Restart your computer, then install Adobe.
If that doesn't work, or UAC was NOT turned off, then you can install Adobe in Windows XP compatibility mode. Browse to the folder where you placed the Adobe installer file. Right click it, and select the compatibility tab. Check "run this program in compatibility mode" then select Windows XP in the list. Adobe should then install.
To your success,
Tim