Vista - Where do I go for help with Office install?

Help! I am new to Vista and new to these forums. I posted this question in the Office subforum as well. Thanks for any guidance or suggestions.

I have tried repeatedly (3 x) without success to complete install of MS Office Enterprise 2007 (from MS DVD media) to a brand new out of the box HP TouchSmart running Vista Home Premium SP1. I have loaded all recommended updates from Microsoft when first setting up the PC. I load the MS Office Ent 2007 DVD, enter my Product Key when prompted, and the installation starts as expected. After about 5 minutes, the status bar in the Installation Progress window is at 100% but nothing happens after that. A check of Task Manager shows the Setup process is stalled. Below is the error log. Any advice on next steps? Thanks.

Product
Microsoft Setup Bootstrapper
Problem
Program Compatibility
Date
7/21/2008 11:30 PM
Status
Report Sent
Problem signature
Problem Event Name: PCA2
Problem Signature 01: setup.exe
Problem Signature 02: 12.0.4518.1014
Problem Signature 03: Microsoft Setup Bootstrapper
Problem Signature 04: Microsoft Setup Bootstrapper
Problem Signature 05: Microsoft Corporation
Problem Signature 06: 200
Problem Signature 07: -1
OS Version: 6.0.6001.2.1.0.768.3
Locale ID: 1033
Extra information about the problem
Bucket ID: 11745768

I was able to resolve the problem earlier this evening with MS Tech Support’s help using suggestions posted in the Office subforum. We checked the registry but could not find the expected install files. I went to Control Panel with the intent to uninstall any MS programs and start over, but received a message that I could not uninstall “until I completed the install that was already running”. This was perplexing because I did not see any active setup processes in Task Manager until I discovered the .exe was running under the system account. Once I stopped this process, I was finally able to complete the install of Office 2007.