Clear your browser cache and re-download VBP, then try temporarily disabling any resident security and other auto-startup software software or running Windows in
Safe Mode when installing.
To manually uninstall Visual Build, unregister all the DLLs in the VisBuildPro7\System subfolder, then delete the installation folder and these folders and registry keys (if they exist):
%APPDATA%\Kinook Software\Visual Build Professional 7
%ALLUSERSPROFILE%\Application Data\Kinook Software\Visual Build Professional 7
HKEY_LOCAL_MACHINE\SOFTWARE\Kinook Software\Visual Build Professional 7
HKEY_CURRENT_USER\Software\Kinook Software\Visual Build Professional 7