Adobe Flash Player Full Standalone/Offline Installer
Please note that this post is over a year old and may contain outdated information.

You can find the current version of the full Adobe Flash Player installer for all operating systems at the following link:
http://www.adobe.com/products/flashplayer/fp_distribution3.html
There is a table for 32-bit and a table for 64-bit, which corresponds to the type of operating system you have. Most people have 32-bit operating systems. If given the choice, download the EXE installer instead of the MSI installer, since it should do additional requirements checking.