Luis, I don't know this whole thread, but RAM is likely not the issue. The amount of RAM shouldn't be that much of an issue. If it is make sure your page file is 1.5 times the amount of RAM you have.
Those error messages are very non-specific. Google them anyway. If there a details button on the bottom left? If so copy and paste it here.
Have you Googled all of the pdf readers like Bullzip (sp?), etc. Also, have you used the actual Adobe Acrobat Pro?
