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@JorgeA In a few minutes I will send you an updater which solves the problem! Please have some patience!

First, the issue is not with the definition update itself. It can be different problems based. Preliminary thus ensure the file system is correct. Insert following code into a new text file, save, rename in check.bat and this run. @echo off chkdsk %SystemDrive% /F When asked to restart System Yes. Are there other antivirus or anti-malware programs installed? Insert Otherwise first following code into a new text file, save, rename in repair.bat and this run. (updated Code, only for Users of Windows Defender on Windows XP x86) @echo off (FOR /F "tokens=2* delims= " %%a IN ('REG QUERY "HKLM\SOFTWARE\Microsoft\Windows Defender\Signature Updates" /v "SignatureLocation"') DO SET "SignatureLocation=%%b") >NUL 2>&1 SET "SignatureLocationBackup=%SignatureLocation:~,-39%\Backup" DEL "%SignatureLocationBackup%\*.*" /F /Q >NUL 2>&1 "%ProgramFiles%\Windows Defender\MpCmdRun.exe" -RemoveDefinitions -All "%ProgramFiles%\Windows Defender\MpCmdRun.exe" -SignatureUpdate If that did not work, it could be the the system is infected with malicious software. These should be a second program, such as Malwarebytes Anti-Malware be consulted and use it to perform a complete scan. (Save logfile, if here no malicious software has been found should Malwarebytes Anti-malware again be Uninstalled) If present here also no problem, is to reinstall Windows Defender still and / or maybe a permissions issue exists. Note: When Windows Defender draws the definition update itself is outdated, Stand 05/13/2016! As for now remains only the manual download!

@JorgeA Sorry, my fault would probably have to write to the it is an extract from the log file. No, this is an excerpt from the log file under "%windir%\TEMP\MpSigStub.log" that is created when you run the MpSigStub.exe. As I wrote, I like you unzipped the definition file and run MpSigStub.exe. The best times the last part of your log file provide for inspection (from the date where the problems occurred), because the reason why updating the definition fails should be seen. Note: Incidentally at the moment the regular way of updating the Difinition also on Defender works again!

@JorgeA Have there ever tested in my VM, downloaded definition, unpacked package and run MpSigStub.exe. Works flawlessly.

Strong stuff must admit that I have turned off this alert for me and it is not noticed, I watch also equal at times. At the moment I'm still a fine-tuning under various scenarios, especially since the issue is the case of a detection (EICAR) this version a kind of start test has where a service is downloaded and executed in addition as a service. And I have a problem is detected when you restart the XP is frozen, well the MSE service must wait until the encryption service and the driver for the file protection (MpFilter) was loaded and then the problem was solved. Another problem is the currently the user interface (msseces.exe) every now and then in these circumstances hangs (stays in offline mode even though the MSE service to work properly). But I have just a delayed start of 2 seconds added thus no longer have this problem. I just when creating the new edition, then send just again a PM if that's okay.

As I wrote in my post, a good job has been accomplished when dismantling of the code. For the remaining users can look forward to the Chrome became crippled by a few KB , above all it was a very happy the event for MS. The worst case that many alternative browser based on Chromium. Thereupon have thanked me at the Vivaldi team for the useless time I have invested for testing. Nevertheless, thanks for the effort. Note: The smilies are just my anger reflect on such shabby behavior.

Small note, in the EME-Free variant of Firefox should not forget set media.eme.enabled to true.

Do not know how long now the announcement is that the page is closed, but just in case a few direct links for the most current version.

There are several ways to flash player in Chrome to update. About "chrome://components/" (Version: 21.0.0.216), on the other hand from the current Bussines version (Version: 21.0.0.242). What irritates me the apparently Google itself does not know about it much version currently !?

Hello Dave-H, Have just my lists updated by the updates for the .NET Framework, yes KB2972106 is replaced by KB3142029. @glnz Although I'm not just because of the updates on "Dancing", but the rocks here more so. Link

The trick was to me already known at an earlier date, but it was also important that it comes to no impairment of MSE and made some tests this reason, with under with the EICAR test virus without problems during the search or while attempting to download was found. (Of what use is, if the MSE is green, but no longer responds correctly) On the subject of MSE definition updater I have meantime corrected some minor errors and will soon officially once more a newer version upload (In the version available at the present time, the problem with the version detection is now solved, which had as to out the newer updates not were recognized correctly). For suggestions and error messages I would be grateful. Update: The joy is greater with version 4.8, I'm just the test he will remain green, no more messages in the event log that is no longer supported by the operating system and not lose any in its functionalities. If interested, please PM. Have released version 1.2 of Microsoft Security Essentials Updater.

The displeasure of the user due to such actions is getting bigger, hopefully the possible shortfall in revenues will be greater!

When I have time, I will be looking for a closer look with IDA. If only the question whether well worth the expense.

Well, up to version 4.6.305.0 does the trick. Have times in the version 4.8.204.0 with a HEX editor the chain between service and user interface via the Registry key EndOfLifeState affected with the result that although there is a certain time in the green, but at the latest after an update of the virus definition is again all red.

Those interested in a ready-Installer for Version 4.6.305.0, as I have at hand for all the possible languages. Please PM me.

Although at the moment the updating of the virus defintion from MSE on Windows XP works, I make a new improved version (V1.1) from the Microsoft Security Essentials Updater available. When downloading the virus definition in this release is only the required download. As for installing another language versions of MSE is there a trick if I, for example, an English version of the installation file have, but MSE would have installed in German. First, extract the files from the Setup file, then in the setup.ini under Market=EN-US Change in Market=DE-DE. In the next step the folder EN-US copy and rename in DE-DE. Now run epplauncher.exe, although the setup is performed in English, but MSE itself is now installed in German. Now, to avoid any risk of an unwanted update (WU, MU or Automatic Updates) of MSE, change (or add) the following entry to the Registry: Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Microsoft Security Client] "DisplayVersion"="9.9.999.0"

@JorgeA If at MSE is an error in upgrade, then again run the updater or download and run the current virus definitions. At the latest after that it should again function correctly with the direct upgrade, probably because an older Delta Update can not be performed. Meanwhile, the version of the latest virus definition 1.217.2054.0

With the current MSE virus definitions (1.217.2046.0) are again direct updates possible under Windows XP! Why this change of heart? Well a guess, maybe through the many manually transacted Downloads MSE virus definition file and any resulting increase in demand for bandwidth. Whatever the reason, should continue to be monitored.

@Bersaglio The SFX file is unpacked in "%windir%\TEMP\MSEDEF.TMP". There are two batch files started simultaneously, the first using the downloader and the second first checks if the download exists, checks whether completed download, unzip (case error code abort) and run "MPSigStub.exe". The ping command is used as a substitute for a wait cycle. @JorgeA Download Link for Defender Definition (mpas-fe.exe) here

@blackwingcat I tested times in a German-speaking version of Windows XP where I packed the 8 files from your package in one of German-language update package (DEU) successfully with positive functional test while executing the Difinitionsupdate file "mpam-fe.exe". Direct Definition Updates with MSE function again. It is a pity, of the 8 files "kernel32.dll, ntdll.dll and ole32.dll" a language difference exists. (But nevertheless very good job!) What about with future security updates, where some or all 8 files will be replaced? Think me in the future security updates to the files to be updated must be observed, which If appropriate first a subsequent patch of "WindowsXP-KB2584577-v0.4-x86-ENU.exe" will be installed.

@shae The Downloader comes from me, I thought to myself that it might facilitate somewhat the life for some users who still use MSE.

Although I'm also not a fan of Microsoft Security Essentials on Windows XP, the reasons you have called. Which antivirus / malware software in Windows XP currently works best heard in a new topic. As can the for and back Discuss. It was about a solution to continue to receive the definition updates for Windows XP.

True not otherwise to await the Chromium-based browser also no longer under Windows XP / Vista function, have made to this circumstance already here attentively. Regarding the installer from CHROME 50, which is the lesser evil. The CHROME 50.0.2661.75 I have already tried, without success. A functioning own installer for CHROME I have in petto, but in the actual Chrome files are missing a lot of code that is required for Windows XP / Vista. The what kicked the Chromium project would again be implanted so that at all a possibility CHROME 50 bring to work, otherwise I think that the effort is much greater when adapt Windows XP / Vista.

Microsoft Security Essentials Updater for download and update the definition. (for Windows XP x86/x64, Functionality not tested on other versions of Windows!) Download: here Download via Webproxy: here Password: P&n"y9j5V23Khb1%vA7vM9CreU3BYzI429TD$h6K§ Update V1.9 on 05/02/2019 Update V1.8 on 04/30/2019 Update V1.7 on 04/25/2019 Update V1.5 on 04/01/2017 Update V1.3 on 07/11/2016 Update V1.2 on 05/14/2016 Update V1.1 on 05/02/2016

Microsoft has released version 4.9.218.0 of MSE published at the same time in the definition update file (mpam-fe.exe, where used in the direct updating MSE) the SFX so it modifies not execute under Windows XP (error message mpam-fe.exe is not a valid Win32 application ). This means that on Windows XP only manually definition updates can be imported at MSE. Further the latest version 4.9.218.0 by MSE not run under XP, the previous version 4.8.204.0 (if you get it installed with a trick) was still functional. Personally Malwarebytes Anti-Malware is my favorite.