Hi,

Trying to install Umbraco with Microsoft Web Matrix on Server 2012 and get "Downloaded file failed signature verification and may have been tampered with"

Log:

DownloadManager Information: 0 : Starting install sequenceDownloadManager Information: 0 : Downloading file 'http://our.umbraco.org/ReleaseDownload?id=87153' to: C:\Users\Administrator\AppData\Local\Temp\2\tmpA888.tmpDownloadManager Information: 0 : Content-Encoding header: 'gzip'DownloadManager Information: 0 : Number of bytes downloaded over the internet: '255'DownloadManager Information: 0 : Number of bytes after possible decompression: '153'DownloadManager Warning: 0 : Error getting last-modified header, error code: 12150DownloadManager Warning: 0 : HttpQueryInfoWithRetry for HTTPQUERYLASTMODIFIED failed.DownloadManager Information: 0 : File 'C:\Users\Administrator\AppData\Local\Microsoft\Web Platform Installer\installers\Umbraco\EC86EB11D0171DB8212E915B50D4AE925AC5115C\ReleaseDownload-id=87153' already exists, deleting old copy of the fileDownloadManager Information: 0 : Moving downloaded file 'C:\Users\Administrator\AppData\Local\Temp\2\tmpA888.tmp' to: C:\Users\Administrator\AppData\Local\Microsoft\Web Platform Installer\installers\Umbraco\EC86EB11D0171DB8212E915B50D4AE925AC5115C\ReleaseDownload-id=87153DownloadManager Error: 0 : Signature verification failed on downloaded file. URL: http://our.umbraco.org/ReleaseDownload?id=87153. File location: C:\Users\Administrator\AppData\Local\Microsoft\Web Platform Installer\installers\Umbraco\EC86EB11D0171DB8212E915B50D4AE925AC5115C\ReleaseDownload-id=87153. File size: 0 kbDownloadManager Information: 0 : Downloading file 'http://download.microsoft.com/download/2/F/6/2F63CCD8-9288-4CC8-B58C-81D109F8F5A3/AspNetMVC4Setup.exe' to: C:\Users\Administrator\AppData\Local\Temp\2\tmpABC5.tmpDownloadManager Information: 0 : Content-disposition header: attachmentDownloadManager Information: 0 : Number of bytes downloaded over the internet: '37684848'DownloadManager Information: 0 : Number of bytes after possible decompression: '37684848'DownloadManager Information: 0 : File 'C:\Users\Administrator\AppData\Local\Microsoft\Web Platform Installer\installers\MVC4VS2010Only\82BCBAE192F8CB875C814821A536C959F85D4727\AspNetMVC4Setup.exe' already exists, deleting old copy of the fileDownloadManager Information: 0 : Moving downloaded file 'C:\Users\Administrator\AppData\Local\Temp\2\tmpABC5.tmp' to: C:\Users\Administrator\AppData\Local\Microsoft\Web Platform Installer\installers\MVC4VS2010Only\82BCBAE192F8CB875C814821A536C959F85D4727\AspNetMVC4Setup.exeDownloadManager Information: 0 : Starting EXE command for product 'ASP.NET MVC 4 Installer (VS 2010)- Default Locale'. Commandline is: 'C:\Users\Administrator\AppData\Local\Microsoft\Web Platform Installer\installers\MVC4VS2010Only\82BCBAE192F8CB875C814821A536C959F85D4727\AspNetMVC4Setup.exe /q /log C:\Users\ADMINI~1\AppData\Local\Temp\2\MVC4VS2010Onlyinstall.htm'. Process Id: 6940DownloadManager Information: 0 : Install exit code for product 'ASP.NET MVC 4 Installer (VS 2010)- Default Locale' is '0'DownloadManager Information: 0 : Install return code for product 'ASP.NET MVC 4 Installer (VS 2010)- Default Locale' is Success

Can some one suggest how I fix the problem?