Windows – Repairing Windows Installer on Windows 7

I have the VMWare MSI '' failed issue. Unfortunately this question does not have an answer yet.

I'm stuck at step 4 of the official VMWare troubleshouting website regarding this issue

Basically it says

Run the installer of the currently installed version of Windows installer [original text "Workstation" seems to be wrong] and choose Repair

However, when I follow the link, it only brings me to Windows Installer Redistributables for Version 4.5. Windows 7 needs Windows Installer 5.0. Microsoft says:

There is no redistributable for Windows Installer 5.0

I have also tried

Start Windows Installer Service
Run MSIExec /UNREGISTER
Run MSIExec /REGSERVER
regsvr32.exe /s %windir%\system32\msi.dll

How can I repair Windows Installer 5.0?

Versions:
Windows 7 SP1 x 64
old VMWare Workstation 8.0.6
trying to install new VMWare Workstation 10