How do you change the site template from SharePoint 2007 to SharePoint 2010?

Question

My current environement is in SharePoint 2010 but some sites still have the 2007 look and feel. How do I change that?

Answer 1

Site Collection Administrators need to to go Site Actions, Site Settings and trigger the Visual Upgrade.

Answer 2

As Eric said, you need to perform visual upgrade. Here is the PowerShell script which iterates through all site collections in a Web application and perform Visual upgrades.

#iterates though all the site collections
    $Mywebapplication = Get-SPWebApplication "http://myserverWebApplication1"
    [Microsoft.Sharepoint.SPSecurity]::RunWithElevatedPrivileges({
    foreach($site in $Mywebapplication.Sites)
    {

            foreach($web in $site.AllWebs)
            {  
                write-host "In the Site Collection URL " $site.Url  "## In the web Named " $web.Name -foregroundcolor Yellow
                $web.UIVersion = 4
                $web.UIVersionConfigurationEnabled = 1
                $web.Update();                
                $web.Dispose();
            }          
            $site.Dispose();

    }