Completely new to this and to be honest no idea what im doing!!!but when I first login I get

HTTP Error 500.19 - Internal Server Error

The requested page cannot be accessed because the related configuration data for the page is invalid.

Module CustomErrorModule
Notification SendResponse
Handler ASPClassic
Error Code 0x80070021
Config Error Lock violation
Config File \\?\C:\inetpub\wwwroot\web.config

Requested URL http://localhost:80/mla_2000/silentlogon.asp
Physical Path C:\inetpub\wwwroot\mla_2000\silentlogon.asp
Logon Method Anonymous
Logon User Anonymous

IIS is running on my local laptop and connection to an sql2008 server.

Thanks any help appreciated