When it comes to viewing .PDF files, adobe reader is probably the most used application. Adobe Reader evolved over the years with many new features being added after each revision. Since version 8, Adobe Reader comes with the Adobe Updater, a feature which I hated since the day I saw it.
Adobe Updater would check and download updates for Adobe Reader whenever the application is launched. This is good if you have a broadband connection but will simply suck if your computer does not have access to the Internet or if you are using a dial up connection. You can manually force it shut every time it runs but I found that pretty annoying. I've trying disabling Updating through preferences but this did not work. So here is what I did to kill the Adobe Updater for good.
Warning: The process below may disable updating of other Adobe products present in your system. If you choose to update any of the products at a later stage, you will have to download the setup files from Adobe site manually.
1. Browse to C:\Program Files\Common Files\Adobe
2. Locate the Updater directory. This directory will be named Updater5 or Updater6, depending on the version of adobe products you have installed on your system.
3. Remove the directory (Updater5, Updater6, etc).
That should do it.