After installing P3 (an old 16-bit version) on my Win2K3 terminal server, I noticed that performance was pathetic - intolerable, actually. There is a permissions problem as well but I don't have a solution to that one yet. Maybe I'll work on that as time permits - but not a big deal as I'm the only one to use it.
Anyway, after trying a few other things I found a posting somewhere that suggested I run the program once immediately after I had installed it but before I returned to execute mode (clicked on "finish" in the add/remove programs dialog). I did this and noticed that the program ran quickly! However, after I left install mode and returned to execute mode performance was back to pathetic. Something in execute mode was causing the problem.
I found an enlightning Microsoft article at: http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/ts_cmd_changeuser.mspx that describes the operation of the Change User comand.
While poking around on google groups with my friend Tony I found this seemingly unrelated article:
Google Groups : corel.wpoffice.office2002-installs
The secret is in program compatibility flags!
Reference: http://www.microsoft.com/technet/prodtechnol/windowsserver2003/library/ServerHelp/31655e26-f0f2-44e3-af91-f0b7d406f531.mspx.
So, to solve, I created the following key:
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\TerminalServer\Compatibility\Applications\P3]
And I then created a new DWORD entry: Flags = 0x00000404
And that's it.
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