HTTP Error 500 – Internal server error When Running ASP on IIS 5

This is a problem I recently have on my machine. I was trying to run ASP on IIS 5 and getting HTTP 500 internal server error. When checking the event logger, I have found this message in the application log:

DCOM got error “The referenced account is currently locked out and may not be logged on to. ” and was unable to logon .\IWAM_MYMACHINENAME in order to run the server:{3D14228D-FBE1-11D0-995D-00C04FD919C1}

To resolve this issue, you will have to delete IWAM_YOURMACHINENAME user from your machine and then reboot it (This user is responsible of the anonymous access on IIS for out of process applications). The user will be automatically created after restarting. Then reset IIS and try to run your ASP script again. It should be working now.