How can I use the registry to disable the Windows Installer rollback functionality?

A. To use the registry to prevent Windows Installer from creating the rollback information described in the FAQ "What's the Windows Installer rollback functionality?", perform the following steps:

1. Start a registry editor (e.g., regedit.exe).
2. Navigate to the HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Installer registry subkey to make the change for all users on that machine or navigate to the HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Installer registry subkey to make the change for the current user.
3. From the Edit menu, select New, DWORD Value.
4. Enter the name DisableRollback, then press Enter.
5. Double-click the new value, set it to 1, then click OK.
6. Close the registry editor.
7. Log off and log on for the change to take effect.