I hate this software with passion ! , but as its used by most people its best if its made to work properly . The main problem i found when deploying the Enterprise MSI was that it always managed to stick to the taskbar when a user ran it ( a real problem for roaming profiles )

To Fix what is written above the following is required

Find the following key on the maching using regedit

"HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{8A69D345-D564-463c-AFF1-A69D9E530F96}

If it exists

DELETE IT !

heres a working kixtart code

IF KEYEXIST("HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{8A69D345-D564-463c-AFF1-A69D9E530F96}")
deltree("HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{8A69D345-D564-463c-AFF1-A69D9E530F96}")
ENDIF