From Information Week
"When you want to put a document online, or distribute it via e-mail, and you need it to look exactly the way it looks on paper, then PDF is the way to go — and the standard application used to view PDF files is, of course, Adobe Reader.
Unfortunately, according to Adobe, Vista doesn’t support older versions of Reader, and the current version, Adobe Reader 8 (released in November, 2006), will be updated for Vista sometime "in the first half" of 2007. So what’s the story in the meantime?
Well, if you’re a Vista user and you decide to install Reader 8, the first hint of any problem may come when you get an error message like "The temp folder on a drive was full . . . " or "The Windows Installer Service could not be accessed. . . ."
Generally, says Adobe, the problem is that you’ve turned off Vista’s massively annoying User Account Control (and who could blame you?). There are two possible solutions, according to a tech note on Adobe’s Web site:
Click here to read the entire tip
I personally have not experienced any problems installing or running Adobe Reader 8 on Windows Vista. The application installs and operates just fine under both Vista x86 and x64 without any modification to the system. But there have been many reports of users having problems with Adobe Reader on Vista so this work around should come in handy.