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What does the internal server error 500 mean in Microsoft IIS?
Actually internal server 500 is collection of serveral server erros. And at first look we will not ABLE find the possible reason why error is actually lies. If we have server installed Microsoft Internet Information Services (Microsoft IIS), the error code will be specified. Here in below DECIAML places indicate the cause of error in More details:-
(1)500.0:-Here module or ISAPI error occured.
(2)500.11:-Here reason will be the shutting down of application on web server.
(3)500.12:-Here reason will be the restarting process of application is occur on the web server.
(4)500.13:-Here reason is web server is very busy.
(5)500.15:-Here reason will be the global.asax not allows the direct requests.
(6)500.19:-Here reason will be the configuration data avaialble is invalid.
(7)500.21:-Here reason will be module is not recognized.
(8)500.22:-Here reason will be ASP.NET httpModules configuration does not apply in Managed Pipeline mode.
(9)500.23:-Here reason will be ASP.NET httpHandlers configuration does not apply in Managed Pipeline mode.
(10)500.24:-Here reason will be ASP.NET impersonation configuration does not apply in Managed Pipeline mode.
(11)500.50:-Here reason will be a rewrite error occurred during RQ_BEGIN_REQUEST notification handling. A configuration or inbound RULE execution error occurred.
(12)500.51:-Here reason will be a rewrite error occurred during GL_PRE_BEGIN_REQUEST notification handling. A global configuration or global rule execution error occurred.
(13)500.52:-Here reason will be a rewrite error occurred during RQ_SEND_RESPONSE notification handling. An outbound rule execution occurred.
(14)500.53:-Here reason will be a rewrite error occurred during RQ_RELEASE_REQUEST_STATE notification handling. An outbound rule execution error occurred. The rule is configured to be executed before the output user cache gets updated.
(15)500.100:-Here reason will be Internal ASP error.

IUSR_CompterName

Yes we can use ADSI, WMI, or COM INTERFACES to configure IIS PROGRAMMATICALLY.

Below are are the DIFFERENT syntax to VIEW the cache files from chrome. We NEED to simple type below text in URL
(1)chrome://view-http-cache/
Or we can use below syntax
(2)chrome://cache/

Now for mozilla we use below syntax
(1)about:cache
Or view can use below for memory storage
(2)about:cache?storage=memory&CONTEXT=
or view can use below syntax for disk storage
about:cache?storage=disk&context=

Now for IE we use below place
%userprofile% AppData Local Microsoft Windows Temporary Internet Files

What is IIS and usage
IIS stand for Internet Information Services and its devloped by Microsoft to handle internet base service to handle asp.net WEB application .
Below are the four main usage of IIS
(1)IIS main MOTIVE is to make computer to work as web server and this will provide functionality to devlop and deploy web application on the server.
(2)IIS will handles the request and RESPONSE model on the web server.
(3)IIS will also offers services of SMTP and for frontpage server extensions also.
(4)We use SMTP to send emails we can use frontpage server extension to get some more dynamic FEATURES of IIS.