Here are additional Details:
Intel(R) Core(TM)2 Duo CPU T5450 @1,66GHz 1,67 GHz
Memory(RAM): 2046 MB
System type: 32-bit Operating System
Is anything possible?
Which version of Adobe Acrobat would you recommend?
Yes: "The application cannot be installed on this operating system. Set up will now terminate. Please refer to the minimum system requirements at http://www.adobe.com/go/acrobat_system_reqs."
It sounds like you might not have SP2 installed for WIndows Vista. http://www.adobe.com/products/acrobatpro/tech-specs.html
Acrobat 9 did not require any Vista Service packs to be installed.