Adobe/EULA.exe not associated?

I wasn't sure where my problem fit in so I put it in with the malware section because I searched online and found that EULA.exe was associated with malware issues.

I have a Hewlitt-Packard Laptop with windows vista as the operating system.

I had a window from Adobe on my computer automatically recommend that I update my Adobe and to change it from 64 to 32 because it wasn't working anymore. I did the update, or at least I thought I did, and I still kept on getting the same message. I wasn't sure what the problem was so I clicked the "HP Documents" icon on my desktop just to see if i could figure out the problem (I don't know much about computers so I was being exploratory). After this a bunch of Adobe icons took place of my other desktop files. For example, my Itunes files still says "Itunes" but the symbol looks like an adobe document. This is the same case for a few other of my desktop items including something that says "uninstalled file," "HP Solution center," "HP Documents." Now when I try to open Itunes I get this error message "This file does not have a program associated with it for performing this action. Create an association in the set association control panel." The file that it says this refers to has the path "C:/Program Files (x86)/Adobe/Reader 9.0/reader/eula.exe". There are also other files on my desktop that have the same error message when I try to access them.

I really have no idea where to go with this and I want to make sure nothing is wrong and find a way to fix this. Please let me know if you can help!