Hello All,I have recently upgraded exchange 2000 to exchange 2003 and every thing went fine. the upgrade was successful and every thing was working fine before i put exchange 2003 service pack 1 and after that OWA 2003 doesnt works out when i try to access the OWA page i see Service Unavailable but with out any code. and when i open IIS and look at application pool i see that ExchangeApplicationPool state Stopped and status is Unspecified Error. and DefaultAppPool same stopped and status unspecified error. I searched for this errors but did not find any help. Did any one faced such thing before? i dont see any way to remove the Exchange Service pack 1. When i try to start the ExchangeApplicationPool or DefaultAppPool it starts and then end and when i look at the event viewer i see the following error.A process serving application pool 'ExchangeApplicationPool' reported a failure. The process id was '7564'. The data field contains the error number.Can some one show me the right way to solve the problem and get it work.Thanks in Advance

Did you find a solution to this problem? I am experiencing similar problems with exchange sp1, only it had been running fine for many years until today. Now i am getting w3svc errors in the event log 1002 and 1039.