Want to uninstall, then perform a clean installation of Office 2007 and WSS B2TR?  Think you can get away with running SharePoint.exe and have a perfectly working WSS?  Not so fast... After a wasted day of failed installs, a broken WSS Search Indexer, bluescreens, and yelling, we offer these tips to keep in mind when migrating, as well as our step-by-step process for a clean reinstallation.

Tips for installing:

• If you want WSS Search to work, you need the .NET v3 Framework RTM installed
• If you can't install the .NET v3 Framework on Windows 2003 Server or you get a "cryptographic services" error, try running regedit and set HKEY_LOCAL_MACHINE \ SOFTWARE \ Policies \ Microsoft \  SystemCertificates \ TrustedPublisher \ Safer to 0.  The Sharepoint Configuration Wizard likes to set it back to 2.
• If you are running Sonic RecordNow to burn your ISOs, make sure you remove it from your startup or uninstall it, or you'll get a neverending bluescreen loop at startup!
• To remove startup items, I highly recommend Mike Lin's Startup Control Panel, found here: http://www.mlin.net/StartupCPL.shtml.
• Even after a WSS reinstall, it is possible for Web Applications to persist which will raise an error if you try to recreate the application.  Be sure you delete them in Central Admin -> Application Management -> Delete Web Application.

Steps for B2TR to RTM migration for Office 2007 and WSS 3.0:

1. Uninstall all Office 2007 applications, including Sharepoint Designer via Control Panel -> Add/Remove programs
2. Uninstall WSS B2TR via Control Panel -> Add/Remove programs.
3. Delete all Content Databases from your SQL server
4. Ensure the SAFER key in your registry is set to 0  (see tip above)
5. Install Office 2007
6. Install SharePoint Designer 2007
7. Install Visio 2007
8. Install Project 2007
9. Ensure the SAFER key in your registry is set to 0  (see tip above)
10. Remove .NET Framework v3 via Control Panel -> Add/Remove programs
11. Run the Microsoft .NET Framework 3.0 Uninstall Tool to clean up any other .NET Framework remnants.  Click YES or OK if you get any warnings during the uninstall- all the files you are being warned about (MSXML 6 for example) will be replaced when you install the latest .NET Framework.
12. Ensure the SAFER key in your registry is set to 0 (see tip above)
13. Install the .NET Framework 3.0 Redistributable (available at http://www.microsoft.com/downloads/details.aspx?FamilyId=10CC340B-F857-4A14-83F5-25634C3BF043&displaylang=en).
14. Update the SAFER key in your registry (see tip above)

Hope this saves you some headaches.

Nathan