Corrine Posted April 17, 2014 Share Posted April 17, 2014 Via Winchester73 at LandzDown who ran into the issue when troubleshooting for someone he was helping. From Microsoft Security Essentials error stutters Windows XP systems: The issue starts as soon as Windows XP system is booted. The MSE error read: “MsMpEng.exe application error. The instruction at “0x5a4d684d” referenced memory at “0×00000000″ The memory could not be read”. The MSE issue arose on the 16th with a faulty update. You might wish to review this: http://support.microsoft.com/kb/971606 1) Boot into safe mode with networking 2) Manually type http://go.microsoft....k/?LinkID=87342 into the address bar to download the 32-bit definition file. 3) The computer should return to normal upon reboot. Winchester73 also recommended the following: a complete shut down of the computer, then power it back up (not a re-start, you want the POST provided by a cold boot). Don't touch any keys (even to close the MSE nag screen about XP) until after the hard drive stops doing its thing and the light goes out. Then click away, open things, close things, see if everything works "normally" again ... The above solution has already helped someone else who is not in a position to replace her computer until later this year. 1 Quote Link to comment Share on other sites More sharing options...
Corrine Posted April 18, 2014 Author Share Posted April 18, 2014 Official explanation of what happened: Antimalware Engine 1.1.10502.0 was released to customers on 17 April 2014 - Antimalware Engine Notifications - Site Home - TechNet Blogs Quote Link to comment Share on other sites More sharing options...
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