Data execution prevention preventing IIS from running...

Client had Windows 2003 w/ no SP and Exchange 2003 SP1. Services such as
SMTP, WWW, MS Exchange Routing would only run for a few minutes and then
stop.


- Tried restarting services and server, no luck.

- Downloaded and installed Windows 2003 SP1 and rebooted

- On startup, got message that Data Execution Prevention was stopping IIS
from running

- Went to BOOT.INI file, changed the line "/noexecute=OptIn" to
"/noexecute=AlwaysOff", rebooted

- On startup, got same message that DEP was stopping IIS.

- Went to System Properties, Advanced, Performance, Data Execution
Protection tab, and everything was greyed out.

- Went to BOOT.INI file, changed line "/noexecute=AlwaysOff" back to
"/noexecute=OptIn", rebooted

- On startup, got same message that DEP was stopping IIS.

- Went to System Properties, Advanced, Performance, Data Execution
Protection tab and items were available for selection. Chose "Turn on DEP
for all programs and services except those I select". "Internet Information
Services" was an available selection and I placed a check mark next to it.
Rebooted.

- On startup, got same message that DEP was stopping IIS.

What am I missing ?