Problem:
When performing an upgrade (in this case, Joomla) in Simple Scripts, it can throw the following error:
"Host Server Unresponsive Unfortunately, the server you are attempting to install on appears to be unresponsive.
Please wait a few minutes to allow your server some time to catch up, then refresh this page to continue.
If you have any questions, please contact your web host through the standard support channels and they will happily assist you."
Solution:
If DNS is pointing to us, then very likely it is the .htaccess throwing the error. A rewrite rule to use another sub folder as the root folder is really bad. Rename that .htaccess file or comment out the rewrite rule. Perform the upgrade and then reset the .htaccess back to normal.