Sometimes you might be in the situation when you accidentally deleted your SharePoint site from IIS. It's not a disaster, because nothing happened to your site, except you lost the access.

The first thing you can logically try is to create new Web Site in IIS, but this won't help. The solution is restoring site via Central Administration

Navigate to Central Administration ->Application Management and extend the site your deleted from IIS. When SharePoint extends the site it verifies if existing site is in IIS, and if not - creates it. After the site will be extended you will have you original site back in IIS

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SharePoint 2010 doesn't allow you to install the "Complete" mode on non-domain local user accounts by default, because it's considered as "Development" environment and you should install in "Single Server" mode.

However, there are several workarounds how to install the complete farm without using the Domain Controller.

1. Changing registry entry HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Shared Tools\Web Server Extensions\14.0\WSS\ServerRole == SINGLESERVER
2. Using PowerShell command "New-SPConfigurationDatabase"

Alternatively, you can use Single Server install modifying installation config.xml, including the follow entry  <SettingId="AllowWindowsClientInstall" Value="True"/>

Sources: 1, 2

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