IIS 7 Stopped. PerformancePoint Error ???

It hit me again, this is the second time I experienced this problem. My VPC with Windows 2008, SQL Server 2008 and MOSS 2007 was working fine until I installed and configured the PerformancePoint. My bad, I did not take a backup of my VPC. Once the PerformancePoint configured (with SP3), I noticed that the Default Application Pool was getting stopped even after restarting and resetting. The entire IIS 7 stopped working. The error was 503, Service is unavailable. I applied all the solutions what I found with my searches, but as most have done, I have to start from the beginning. No solutions, but reinstall whole thing.......