Cannot be restored to a server running the current versionsometimes we encounter the follow question when use the powershell restore the sitecollection bakup.
Restore-spsite: Your backup is from a different version of Microsoft SharePoint Foundation and cannot be restored to a server running the current version. the backup file shoshould be restored to a server with version' 14. 0.0.6123'
Or later.
Here is the solve method: Just install the Sharepoint Server 2010 update version.
First: You shoshould be sure you already install Sharepoint Server SP1, if you didn't install it, here is the link to download
Http://www.microsoft.com/en-us/download/confirmation.aspx? Id = 26623, install it.
Second: Download the server version that you shoshould wanted and install. Here is the link to download: http://www.sharepointdesignerstepbystep.com/blog/SitePages/SharePoint%20versions.aspx
Finally, that's all right, Goog luck to you!