Application pool "DefaultAppPool" is being automaticallydisabled

Pls check if there are any events triggered reg asp loading in application eventlog

If so, try C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\aspnet_regiis. exe -u & i

you may get popup like application failed to initialize...

Pls repair the Framework installation and try again registering asp files in IIS.

This must work.