In order to install sharepoint on client operating system such as windows 7 , windows vista there are lots of hotfixes we have to download and install before running the sharepoint application file .Even after installing all of required hotfixes still you may face one more issue if you are going to create sharepoint site through utility written in c#/powershell on windows 7 machine . You may get an exception as mentioned below Unrecognized attribute 'allowInsecureTransport'. Note that attribute names are case-sensitive. (C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\WebClients\Bdc\client.config line 36 or Unrecognized attribute 'allowInsecureTransport'. Note that attribute names are case-sensitive. (C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\WebClients\SecurityToken\client.config line 41) Remember , this is because of missing update for Windows 7