No probs here! Worked first time. Install Order: 1. .net Framework 1.1 2. .net Framework 1.1 SP1 3. Sonic Encoders. 4. Rollup 2 kb900325 (19mb) 5. Windows Media Format 9.5 6. Update Rollup 2 (kb908250) All other parts of the Rollup 2 .exe were installed as 'Hotfixes' earlier on during installation