Since you are new to the site, I will be kind.
Technical questions belong in the Technical Q&A section of the site.
You will usually get a faster response by posting questions there.
As to your issue;
It is VERY common for software installers to install additional components and applications often without the users permission.
Adobe Acrobat Reader is often installed so that the user can read the manual or help file for the software.
JAVA, Macromedia, and Quick Time are often installed because they are needed by the application.
The most maddening thing I run into, is that most of the time, the installers do not recognize that a newer version of the software is already installed and attempt to install an older version.
Another typical problem with some software installations is that unless you install ALL of the add-on applications the software installation does not complete and the desired new application will not run.
Bottom line, this is a case of a poorly written software installer. Not a Windows OS problem.
There are at least 3 different installation engines used with Windows.
If the software is attempting to install an older version of Acrobat, you may need to let the installation complete, and then reinstall the latest version.
Chas