I have tried now a few times already to install Vault 2014 Client (beta3) on my Win7 (x64) machine: without success :(

I got this error message when the setup failed:

Microsoft Visual C++ 2008 SP1 Redistributable (x86) Failed Installation aborted, Result=1619

After searching a lot I found this:

http://forums.autodesk.com/t5/AutoCAD-Architecture/Error-1603-installing-Autodesk-AutoCad-Architecture-2011/td-p/2749230

Then I found the solution:

1) remove all the  “Microsoft Visual C++ *” programs via “Control Panel / Programs and Features”

2) install .Net framework 4.5 manually

3) run the Vault Client Setup again

I hope this will also help you to save your time ;)