10.6 Installation Error?

Hi,
When I run the 10.6 setup file, I get the Map Publisher screen and language choice. I choose english. Then, I get a Windows Installer window with the following text and have no choice but to click OK and no installation…

Windows ® Installer. V 5.0.18362.1

msiexec /Option <Required Parameter> [Optional Parameter]

Install Options
</package | /i> <Product.msi>
Installs or configures a product
/a <Product.msi>
Administrative install – Installs a product on the network
/j<u|m> <Product.msi> [/t <Transform List>] [/g <Language ID>]
Advertises a product – m to all users, u to current user
</uninstall | /x> <Product.msi | ProductCode>
Uninstalls the product
Display Options
/quiet
Quiet mode, no user interaction
/passive
Unattended mode – progress bar only
/q[n|b|r|f]
Sets user interface level
n – No UI
b – Basic UI
r – Reduced UI
f – Full UI (default)
/help
Help information
Restart Options
/norestart
Do not restart after the installation is complete
/promptrestart
Prompts the user for restart if necessary
/forcerestart
Always restart the computer after installation
Logging Options
/l[i|w|e|a|r|u|c|m|o|p|v|x|+|!|*] <LogFile>
i – Status messages
w – Nonfatal warnings
e – All error messages
a – Start up of actions
r – Action-specific records
u – User requests
c – Initial UI parameters
m – Out-of-memory or fatal exit information
o – Out-of-disk-space messages
p – Terminal properties
v – Verbose output
x – Extra debugging information
+ – Append to existing log file
! – Flush each line to the log
* – Log all information, except for v and x options
/log <LogFile>
Equivalent of /l* <LogFile>
Update Options
/update <Update1.msp>[;Update2.msp]
Applies update(s)
/uninstall <PatchCodeGuid>[;Update2.msp] /package <Product.msi | ProductCode>
Remove update(s) for a product
Repair Options
/f[p|e|c|m|s|o|d|a|u|v] <Product.msi | ProductCode>
Repairs a product
p – only if file is missing
o – if file is missing or an older version is installed (default)
e – if file is missing or an equal or older version is installed
d – if file is missing or a different version is installed
c – if file is missing or checksum does not match the calculated value
a – forces all files to be reinstalled
u – all required user-specific registry entries (default)
m – all required computer-specific registry entries (default)
s – all existing shortcuts (default)
v – runs from source and recaches local package
Setting Public Properties
[PROPERTY=PropertyValue]

Consult the Windows ® Installer SDK for additional documentation on the
command line syntax.

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Portions of this software are based in part on the work of the Independent JPEG Group.