MpOAv.dll is a Windows DLL file. DLL is the abbreviation for Dynamic Link Library. DLL files are needed by programs or web browser extensions, because they contain program code, data, and resources. The following information can help you determine if MpOAv.dll is a Windows system file or if it belongs to an application that you can trust.
Description: MpOAv.dll is not essential for the Windows OS and causes relatively few problems. MpOAv.dll is located in a subfolder of "C:\Program Files (x86)"—for instance C:\Program Files (x86)\Microsoft Security Client\.
Known file sizes on Windows 10/8/7/XP are 212,280 bytes (38% of all occurrences), 108,328 bytes and 7 more variants.
A .dll file (Dynamic Link Library) is a special type of Windows program containing functions that other programs can call. This .dll file can be injected to all running processes and can change or manipulate their behavior. It can change the behavior of other programs or manipulate other programs. The program is not visible. The file is certified by a trustworthy company. There is no detailed description of this service. MpOAv.dll is not a Windows system file. You can uninstall this program in the Control Panel. Therefore the technical security rating is 27% dangerous.
Recommended: Identify MpOAv.dll related errors
Important: Some malware camouflages itself as MpOAv.dll, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the MpOAv.dll 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.
A clean and tidy computer is the key requirement for avoiding problems with MpOAv. 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, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.
To help you analyze the MpOAv.dll 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. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.