Problem in IIS 7.0 during publishing of ASP.NET web application built on framework 3.5
There were two errors which I faced
- HTTP Error 500.19 – Internal Server Error 0×80070021
- HTTP Error 404.3 – Not Found 0×80070032
How to remove HTTP Error 500.19 – Internal Server Error?
Error Code 0×80070021
This error occurs when IIS is not installed completely i.e. You’ve install IIS but asp.net isn’t installed and by default asp.net doesn’t install automatically so you have to install asp.net.
I’ve windows vista so I went to control panel > Program and Features > Turn Windows features on or off
There I selected IIS and asp.net as shown below
After pressing ok , You hopefully will not get this error again, but if you do simply goto run or press WINDOW KEY + R and type
%windir%system32inetsrvappcmd unlock config -section:system.webServer/handlers
Now this error was removed but HTTP Error 404.3 – Not Found was still there.
How to remove HTTP Error 404.3 – Not Found?
Error Code: 0×80070032
If you get this error, the only solution is to reinstall IIS. This error will be removed.
I hope my experience will be helpful for most of the people. 
nice …..
nerd :O