We just got a new phone system in our office (ip phones) and the desktop software will not install on a couple of computers.
Both computers are Vista SP2 (just like the others where the install worked fine) but am getting an error 1720 referring to the Windows Installer.
I haven't been able to find the correct Windows Installer for these machines, or else it isn't working correctly. I tried to install 4.5 windows installer and it just kept telling me not enough disk space (which is completely not true). So I searched for windows installer for Vista and wasn't able to find what I thought was the exact version, or any version I could get to work on these two machines.
Attached is the description of the error in Event Viewer