on a w2k8 64bit server in the same site as the schema master. running cmd prompt as administrator. The Exch2010 install files are local.enter command:setup /prepareschemait starts to run,... finishes copying setup files and about 10secs after it finishes copying the files I get a popup window labeled Unsupported 16-bit applicationthe body of the popup reads:the program or feature"\??\C:\Windows\Temp\ExchangeSetup\ExSetup.exe" cannot start or run due to incompatibity(yes its spelled incorrectly in the popup) with 64-bit versions of Windows. Please contact the software vendor to ask if a 64-bit Windows compatible version is available.what gives, any help is appreciated.

Is there any related event in the application log on the server? The symptom will occur if there’s other 32-bit application on the machine, even the windows server 2008 is 64bit. One instance is the 32-bit .Net framework, which cause the same issue Resources: Application Compatibility: Windows Vista 64-BitJames Luo TechNet Subscriber Support (http://technet.microsoft.com/en-us/subscriptions/ms788697.aspx) If you have any feedback on our support, please contact tngfb@microsoft.com

hi ,check that ur netframework in ur IIS is X64 bit not X86 if not uninstall it & download netfarmework X64 bit then try to prepare the schema again

sorry this has taken so long, i've tried to run it again on a newly installed 08 r2 box w/only the .net feature installed and am still getting the same error.event viewer has only this event and its informational event in the app log 1109 source is Wow64 Emulation layer.The program or feature "\??\C:\Windows\Temp\ExchangeSetup\ExSetup.exe" cannot start or run due to incompatibity with 64-bit versions of Windows. Please contact the software vendor to ask if a 64-bit Windows compatible version is available.Mohamed wouldn't installing the .net from server manager via add feature install the 64 bit version?

Hi,Did you verify the location mentioned in the error i.e C:\Windows\Temp\ExchangeSetup\ExSetup.exe ???Try doing this:-1. Go to C:\Windows\Temp2. Rename or delete the folder ExchangeSetup.3. Run Setup /ps again.RegardsSujit

after clicking ok on the error popup all the files in the temp dir are deleted. The source files are directly downloaded off the Microsoft volume license site. There is no other choice but to download the 64bit version of exch2010. FYI my acct is a schema/enterprise and domain admin.

Its working downloaded the ISO again from MS and instead of copying the binaries to disk I ran the setup /ps from the iso directly and it works.