When you mention that you are using the Office Suite Preview of 2010 along with iTunes on Windows 7 RC1, encountering reinstallation prompts every time you launch the programs could be due to various reasons. Here are a few potential explanations and solutions for this issue: 1. Permissions Issue: The programs might be facing permission issues to write to their installation directories or registry keys. This can happen if the programs are not granted the necessary permissions. - Solution: Try running both programs as an administrator. Right-click on the program shortcut, select "Run as administrator," and check if this prevents the reinstallation prompts. 2. Corrupted Installation: The installation of either the Office...