The genuine AM_Delta.exe file is a software component of Microsoft Forefront Endpoint Protection by Microsoft Corporation. An executable file named "AM_Delta.exe", when found in "C:\Windows\SoftwareDistribution\Download\Install\", is a Microsoft download package that installs a delta definition update, (not a "full" engine and definition update), containing changes to antimalware threat definitions, to keep Forefront Endpoint Protection or other Microsoft antimalware products current with constantly changing malware threats. The file name may also be "AM_Delta_Patch2.exe" or "AM_Delta_Patch.1<version>.exe", although "_Patch" files are usually 300MB-400MB in size while "AM_Delta.exe" files are about 10 times larger, depending upon the volume of threat definitions included. The execution of an "AM_Delta.exe" or "_Patch" file is started using "MPSigStub.exe" with the name of the signature update file as a parameter. Downloading and execution of such files occurs in an enterprise environment controlled by WSUS (Windows Server Update Services), an integral part of the Windows Server OS. In 2016, 41 years after its founding, Microsoft was the world's largest software company by revenue.
AM_Delta stands for Microsoft Anti-Malware Signature Delta Update Package
The .exe extension on a filename indicates an executable file. Executable files may in some cases harm your computer. Therefore, please read below to decide for yourself whether the AM_Delta.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.
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Description: AM_Delta.exe is not essential for the Windows OS and causes relatively few problems. AM_Delta.exe is located in a subfolder of C:\Windows (mainly C:\Windows\SoftwareDistribution\Download\Install\).
Known file sizes on Windows 11/10/7 are 4,387,096 bytes (11% of all occurrences), 2,226,072 bytes and 7 more variants.
The program is not visible. It is digitally signed. The AM_Delta.exe file is not a Windows core file.
AM_Delta.exe is able to monitor applications.
Therefore the technical security rating is 21% dangerous; however you should also read the user reviews.
Uninstalling this variant:
You have the option to uninstall the program using the Control Panel ⇒ Uninstall a Program ⇒ Microsoft Anti-Malware Signature Package or ask Customer Support to assist you.
Important: Some malware camouflages itself as AM_Delta.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the AM_Delta.exe process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.
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User Comments
its always slowing my computer down, i cant find it in my files and im unable to shut it down in task manager. ryan
It uses around 44 k of memory usage most of the time, and I comes with mpsigstub exe as a readable update for your computers virus definitions when it updates Microsoft security essentials. Alex (further information)
It is part of the Windows Anti-Malware system. It is completely safe. Phil
Microsoft Anti-malware Program. You can check using "Microsoft Security Essentials". Jason
What is AM_Slim_Delta.exe? It's in C:\Windows\SoftwareDistribution\Download\Install\ (I don't see AM_Delta.exe there, though.) I'm guessing probably this is the version used for the slimmed-down version of Windows 10, in other words: S Mode (which actually is supposed to provide end users with tighter security than is typical on the full-fat versions of Windows 10). Reader
Summary: Average user rating of AM_Delta.exe:
based on 4 votes with 5 user comments.
3 users think AM_Delta.exe is essential for Windows or an installed application.
One user suspects danger.
One user is not sure about it.
Best practices for resolving AM_Delta issues
A clean and tidy computer is the key requirement for avoiding problems with AM_Delta. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.
Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.
To get your computer running as fast as it did on day one, you can 8reset your PC. Your personal files will remain intact, but any programs you installed will need to be reinstalled.
To help you analyze the AM_Delta.exe process on your computer, the following programs have proven to be helpful: ASecurity Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. A good Bantivirus software detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.
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User Comments
ryan
Alex (further information)
Phil
Jason
Reader
Summary: Average user rating of AM_Delta.exe: based on 4 votes with 5 user comments. 3 users think AM_Delta.exe is essential for Windows or an installed application. One user suspects danger. One user is not sure about it.