Thread:Project:Support desk/Webpage broke after reinstalling "PHP"

I'm not sure what version of MediaWiki we are running, unless you can tell me how I can find out in IIS... I installed PHP v5.3.10, I went through all the config steps to configure PHP for IIS (at least I think I did)... The version of MySQL is v5.1... I also upgraded FastCGI to v1.5... website address is "https://offside/mediawiki/index.php but I think you can only get to it inside our network. It doesn't matter since it's not coming up anyways. I'm getting a "The page cannot be found" error

It all started with a user was getting a "The FastCGI Handler was unable to process the request". I am not a developer or programmer at all and there is no one else in my department that is familiar with IIS. So I drew the short straw. After a lot or research on google, I tried upgrading the "fastCGI" and PHP and that's when it all went down hill. Is there anything else I can do. If not, can I start over by backing up the files and recreating the website?