Your computer will restart several times. This is normal. It may stay on a "Configuring Service Pack" screen for 30–60 minutes depending on the speed of your processor. Troubleshooting Common Issues
This is the specific identifier for Service Pack 1. windows 7 starter service pack 1 download
This usually means some update files are missing. Try running the "System Update Readiness Tool" (KB947821) provided by Microsoft. Your computer will restart several times