We have a Windows 2003 R2 server on which I am unable to execute any 16-bit installers to upgrade a legacy app. When double-clicking on the installer, nothing happens. No error message and no entry in the event viewer logs. I have tried the following: - Change the Compatibility Mode to all options - Enabled the "Allow non-administrators" to run this program - Tried running under a domain admin account and a local admin account This app was previously running on another Windows 2003 R2 server on which we were able to run these 16-bit installers.

Hi, Is this a Windows 2003 R2 server x86 or X64? The support of 16 bit on 64 bit platforms has never existed. SysWOW64 supports 32-bit, but not 16bit. Windows and 16 bit applications http://blogs.technet.com/b/chitpro-en/archive/2009/04/14/windows-and-16-bit-applications.aspx BrentPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Hi, This is a x86 server.

Hi, Does this issue exist when you perform a clean boot? How to perform advanced clean-boot troubleshooting in Windows XP/2003 http://support.microsoft.com/default.aspx?scid=kb;EN-US;316434 How to troubleshoot a problem by performing a clean boot in Windows Vista/2008/7 http://support.microsoft.com/kb/929135 "16-bit MS-DOS Subsystem" error message when you run an MS-DOS or 16-Bit Windows program in Windows Server 2003 or Windows 2000 Server http://support.microsoft.com/kb/305521 Brent Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. ”

Hi, Yes the issue still exists when performing a clean boot following the KB in your post. I tried the following with no success: - Safe Mode with Networking - Safe Mode without Networking - Ran MSConfig and deselected all options GB

Hi, Do you have any other ideas on how to resolve this issue? thanks, GB

Hi, Can anyone assist me with this? GB