Quicken 2009 installs fine on Windows 7 X64, up until it tries to go online to install updates it immediately ends with no error messages. When you try to start the program, it complains that some files are corrupted and wants you to reinstall. I have tried "run as administrator" to no avail.
The workaround is to turn off UAC by setting it to its lowest setting, rebooting, performing the install (the updates work fine), then resetting the UAC level you desire.
Len