You can't download Adobe. Adobe is a company. For MS Vista you can use Adobe Reader 9.
I just started having problems today with not being able to open ANY pdf attachments and I am using Windows 32 -- Vista. I just bought this computer 4 days ago -- any suggestions on how to make Adobe compatible? There's Adobe Reader 9 & 8 installed. I wasn't having any issues with not being able to open adobe attachments until today. HELP!
There's Adobe Reader 9 & 8 installed. HELP!
That is potentially your problem right there. You should never have more than one version installed. They will fight over the resources if you have more than one.
First suggestion would be to remove both and install only one to see if that clears up your issue.