IE stops ANY website from loading because of Data Execution Prevention (DEP).

Hi, we have an old Windows XP machine we use for testing code for backwards compatibility to Windows XP Professional. That machine uses Windows Internet Explorer 8. We also have Norton 360 loaded on it for security purposes, but I'm not sure how much that is actually helping.

That machines has several users. However, only one of the users is getting an error when trying to access Internet websites - ANY website.

His IE8 loads to the default Home page, which is ( and then, as soon as he try to go - anywhere else -  (i.e.,,, ANY major website) his browser redirects him to a blank white page that says the following error:

"A malfunctioning or malicious add-on has caused Internet Explorer to close this webpage. "

When you click on "more information" its says that the Windows "Data Execution Prevention (DEP)" has prevented code from running on the machine for security reason.

OK, so we disabled ALL Add-Ons, and also "Reset" the Windows IE browser settings. -- Still, the machine stops web pages from loading.

We've run Norton 360 "Full Scans" on the machine numerous times and even from the Admin account and all it does is removed Tracking Cookies.

As I mentioned above...this only happens for one user. All the other users have no issues surfing the web, if they need to. Or using other web browsers like FireFox.

One option is to save the user's data and delete his account and then recreate it under another name.  I'm not sure, but that should help, but it seems to be a user specific problem and only on Windows IE8. Although we can delete the account and recreate it, we'd really like to know what this is so we can solve the problem rather than trying to sidestep troubleshooting the issue.

Can someone share any insight of what could be causing this or how to solve it? -- Where is this malicious add-on that the browser is seeing for one user and not the others?

Thank you,
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In my research, disabling DEP in IE8 is your answer. Also try lowering security in IE8 for that user.

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Mr_FulanoAuthor Commented:
Bill, I did that per your suggestion, but it did not work. It now keeps trying to restore the webpage and after two tries, stops.
is the system XP SP3 ?  if not - update it
look if changing the DEP settings helps :
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Mr_FulanoAuthor Commented:
Hi Nobus, yes...that machine is running SP3 and the DEP was set for essential programs only - not all programs.

I'm beginning to believe this is some sort of virus that is affecting one user only, because all the other users can access the Interbet via IE8 without any DEP errors.

I think we've decided to stop wasting time and delete the user and recreate him under a different name. That way, whatever bug has infected that one user gets wiped out.

Thanks for your help,
Mr_FulanoAuthor Commented:
In the end it was easier to simply delete IE8 and go with FireFox. If we need IE for anything specific, we'll simply have to download it again. Thank you both for your help, and although we didn't arrive at a solution, you tried to, I split the points evenly.
tx for feedback
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