I installed Windows Vista on my laptop and it came time to install GhostDoc. During the installation process it encountered an error and as a result I couldn't finish the installation. In order to install GhostDoc setup needs elevated administrator privileges. However, the msi file doesn't have the Run as administrator option when you right-click it. The work around is what I found here. Create a batch file with the following:

msiexec /i c:\PathToGhostDoc\GhostDoc1.9.5.msi

Then run the batch file as administrator and GhostDoc will successfully install.