Welcome to Seven Forums DevPump. What is the exact error you get when trying to install using the Windows Installer? While awaiting the answer, I can suggest 2 things that will just give us some information.
First, lets see if the correct path to the msiexec.exe is set in the registry. I'll not have you make any changes, just see what your path is.
Start> In search box type
and press enter
Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSIServer
Click on MSIServer, and see if the path is the same as mine
This is the same as C:\WINDOWS\System32\msiexec.exe /V if your OS drive is C:\
This second thing is easy, and a great tool to have if you ever have issues installing in windows. Download Safe MSI
, and unzip it to your desktop for now. Also have a program installer on the desktop you are having problems installing. Boot into Safe Mode: Safe Mode
Click on the safemsi.exe, you should get a popup that the windows installer service has been started. If not, then boot back into windows and let us know that didn't work.
If the windows installer was successfully started, then try to install the program you were having problems with. If it installs correctly, then likely some program or service is interfering with the Windows Installer.
If you are successful, then perform a clean boot to see what is interfering. Troubleshoot Application Conflicts by Performing a Clean Startup
Let us know what you found. A Guy
Edit: You say you reregistered the exe, did you reregister both the 32 bit and the 64 bit?
Start> In search box type Run and press enter> Type msiexec /regserver in the Open text box, and then click OK.
Start> In search box type Run and press enter> Type %windir%\Syswow64\Msiexec /regserver in the Open text box, and then click OK.