Repeat instance of Data Execution Prevention (DEP)

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I am new to these forums so apologies if this is the wrong place. A few days ago I started getting the attached window keep popping up. Doesn't matter how many times I click apply, OK - it keeps coming back. Any suggestions ?

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Hello David,&nbsp;Data Execution Prevention (DEP) events are usually caused by a corrupted or incompatible add-on. Try using Internet Explorer (No add-ons) to see if you can identify a specific add-on that is causing the DEP events from occurring:&nbsp;·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Click&nbsp;Start·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Click&nbsp;All Programs·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Click&nbsp;Accessories·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Click&nbsp;System Tools·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Click&nbsp;Internet Explorer (No add-ons)·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Click&nbsp;Tools·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Click&nbsp;Manage Add-ons·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Click&nbsp;Toolbars and Extensions·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Under&nbsp;Show: click All add-ons·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Click any add-on·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Press&nbsp;CTRL + A on your keyboard (this should select all add-ons)·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Click&nbsp;Disable all·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Click&nbsp;Close·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Close&nbsp;Internet Explorer (No add-ons)·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Open&nbsp;Internet Explorer&nbsp;Now all add-ons are disabled in Internet Explorer, test to see if the same problem occurs without add-ons. If the problem is fixed then the next step is to enable the add-ons one by one to find which is causing the problem. (an alternative method is provided below these instructions)&nbsp;·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Click&nbsp;Tools·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Click&nbsp;Manage Add-ons·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Click&nbsp;Toolbars and Extensions·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Under&nbsp;Show: click All add-ons·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Click the first disabled add-on·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Click&nbsp;Enable·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Click&nbsp;Close·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Surf a few pages·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Close&nbsp;Internet Explorer·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Open&nbsp;Internet Explorer&nbsp;If Internet Explorer still opens/works correctly, the add-on you enabled is good to stay. Repeat the enabling process for the next disabled add-on and continue this process until the problem returns. Then the last enabled add-on will need to be disabled/uninstalled/updated to avoid further problems.&nbsp;Alternative method:Instead of enabling add-ons one at a time, you could enable the first half of the add-ons and then test. If the problem is still gone, the add-ons you enabled are good to stay. Then enable half of the remaining disabled add-on and so on until the problem returns. Once the problem returns, you will need to test the last group of add-ons you enabled one by one.&nbsp;Look forward to hearing back from you.&nbsp;https://answers.microsoft.com/en-us/ie/forum/ie8-windows_other/windows-data-execution-prevention-keeps-popping-up/909332c4-c3b0-4008-b026-752d6705f183?auth=1&nbsp;ThanksGowrish

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Repeat instance of Data Execution Prevention (DEP)

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