possible issue for ASP.Net web application not working

[arunprakashb]

Hi,
In my machine i had an issue of all ASP.Net Web applications not
working. All page requests simply throw 404 Page not found error.
Accidentally i resolved this issue when i was trying to install Windows
Sharepoint Services. I thought this might be useful for others who
might be facing the same problem.

Problem:
All page requests simply throw 404 Page not found error.

Possible Cause:
Internet Information Services (IIS) 6.0 is set to run in IIS 5.0
isolation mode.

Resolution:
Set IIS 6.0 to worker process isolation mode. To change to this mode,
open Internet Information Services (IIS) Manager, and in the Web Sites'
Properties dialog box, on the Service tab, clear the Run WWW service in
IIS 5.0 isolation mode check box.
Regards,
Arun Prakash. B