Good morning!I set some time aside this morning to upgrade our Exchange server installation and have promptly run into a problem. I have downloaded Exchange Server 2007 Service Pack 1 (E2K7SP1EN64.exe) to the desktop of the server, double-clicked on it, and got the error "C:\[yada yada]\E2K7SP1EN64.exe is not a valid Win32 application."This is a single-server Exchange 2007 installation on Windows Server 2003 Standard x64 Edition Service Pack 2. I am usually a decent Googler, but I am absolutely lost as to why I would get an error like that on a 64-bit Windows installation.Any help would be greatly appreciated.Thanks in advance!Nick

I think quite possibly the error is something which has been inherited from the x32 distro's & never completely updated. As for what the error means, I would presume that your downloaded install file is somehow incomplete / corrupt. A good way to check this is to run an MD5 Sum check against it using something like md5summer & compare the results with the check sums released by MSFT. Alternatively, you could just redownloadit & try your luck again until you get the complete file.

Hi Johan,Thank you for your initial answer. I downloaded SP1 twice with the same result. While I was unable to find the md5 sum published by Microsoft, I did generate it for the file I downloaded. If you can point me to Microsoft's sums I can compare the two. Here is what I got for my downloaded one:dd62bc1db59a8bf077c3dde15e64bbd0 *E2K7SP1EN64.exeThanks again!Nick

Hi folks,I apologize for wasting everyone's time. After downloading the Service Pack for the fourth time it finally worked. Got a different checksum, too.Thanks again!Nick