Adobe Acrobat Reader 8 won't install on Vista
1.) Run the Acrobat Reader 8 setup file (AdbeRdr80_en_US)
2.) When prompted with the Open File - Security Warning dialog box asking you if you want to run this file?, Hit Start and type %userprofile%\AppData\LocalLow\Netopsystems\temp\
3.) Copy the Adobe Reader 8.0 folder to a destination of your choice.
4.) Run AcroRead.msi to install Acrobat Reader 8 without errors
Update: Adobe has now released Acrobat Reader 8.1 which is Vista compatible