Hello David,
Adobe Reader's offline download for Windows see: ftp://ftp.adobe.com/pub/adobe/reader/win/
There you click through to the most current, complete offline version of the Adobe Reader. This installation file, you can carry around easily e.g. on a USB stick and also install on PCs that do not have Internet access.
An important decision during the installation relates to the updates, therefore you should use the last option
Good luck!
Hans-Günter