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EMS memory and XP (Users)

posted by paulrichards, 25.03.2013, 05:06

Arjay:

> So I'm no further forward :-(
Well, I seemed to have stumbled on a solution :-D

I was looking in Control Panel and I spotted an icon I didn't recognise so I clicked on it. It was Installshield Update Manager, as it happened. Immediately it came up with a Data Execution Prevention message saying that this program was prevented from running. So I cancelled it - it then came up with the famous NTVDM.EXE message. So I looked at my DEP options. Instead of the default (Turn on DEP for essential Windows programs and services only) I had, deliberately and many months ago, listed a series of exceptions and requested DEP to work for all Windows programs and services except those I had listed. Installshield wasn't one of them.

I couldn't see how this related to the NTVDM but, since I'd received the message, I restored the defaults and rebooted - who knows, anything is possible.

Lo and behold mem/c works and I can launch 16-bit programs :confused:

I don't know why but - so far - everything seems to now work as expected.

This has been a bit of a saga - thanks to everyone who contributed. I still don't know why I got the problems that I did - as I say, I had changed DEP options many months ago so why the NTVDM message started appearing a week ago stumps me completely.

---
Paul
Melbourne, Australia

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