Website stop working after upgrade windows 2008R2 SP1, Need quick fix

My site stop working after upgrade Windows 2008R2 to SP1. I need to fix this with some other minor issues. - After installed Windows 2008R2 SP1, I can't view my site anymore. I got these errors: | Module | ManagedPipelineHandler | | ------------ | | Notification | ExecuteRequestHandler | | Handler | ExtensionlessUrl-Integrated-4.0 | | Error Code | 0x800703e9 | - I need these pages always in SSL mode: "My Account", "Register", and "Post ad". I am only have SSL for my top level domain, but not sub-domain pages. So after user logged in and navigate to sub-domain pages, SSL will be broken. I want users to be re-directed back to SSL mode if he comeback to the pages mentioned above. - My site has url-rewritten, but missed a few pages. I need to change any .aspx pages to .html(only a few left). - I don't know why after login in SSL mode, my website layout is broken. This happened in all major browsers. This need to be fixed. My site was designed the following Technology: - Visual Studio 2010, .NET 4.0, IIS7, MS SQL 2008R2, Windows 2008R2 I will provide VS2010 project, and coder will send me back in same format when project is done. Thank you.