How to eliminate MpFilter driver problemsThe MpFilter.sys (MpFilter.sys) file is a Windows driver. Generally, drivers are used by Windows to enable internal components like graphic cards and drives, or external devices, such as printers, backup media or input devices.
Click here to check if you need to update your MpFilter driver.
The MpFilter.sys process is also known as Microsoft antimalware file system filter driver and is a part of Microsoft Malware Protection. This software is produced by Microsoft (www.microsoft.com). An obsolete or defective version of MpFilter.sys can cause problems for your computer that can range from slowness to error messages such as these:
- MpFilter.sys has stopped working. Windows is checking for a solution to the problem... (Windows 10, 8, 7)
- MpFilter.sys has stopped working. A problem caused the program to stop working correctly. Windows will close the program and notify you if a solution is available. (Windows 10, 8, 7)
- MpFilter.sys has encountered a problem and needs to close. (Windows XP)
- Access violation at address FFFFFFFF in module MpFilter.sys. Read of address 00000000.
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What you should know about MpFilter.sys MpFilter.sys
MpFilter.sys is not part of Windows, but it is important nonetheless. The file MpFilter.sys is found in the C:\Windows\System32\drivers directory.
Frequently occurring are file sizes such as 193,552 bytes (20% of all these files), 231,960 bytes, 165,264 bytes, 151,216 bytes or, as the case may be, 165,648 bytes.
If necessary, you can manually stop or start this driver in the Device Manager. The Device Manager can be found in Windows Control Panel under Hardware and Sound/Devices and Printers/Device Manager. The driver facilitates access to your computer's hardware and accessories. You may uninstall the related program using Windows Control Panel. The original file by Microsoft is digitally signed. So please check the file on your computer. This process does not appear as a visible window, but only in Task Manager. The original file has a digital certificate (see its file properties). This file does not come from Microsoft and is not part of the operating system. MpFilter.sys appears to be a file that was compressed by an EXE-Packer. This technique is often used by trojans to keep the file size small and also hamper debugging efforts. However, this in itself is not sufficient reason to presume malicious intent, since even well-intentioned, professional software producers take advantage of compressed files. For this reason, 0% of all experts consider this file to be a possible threat. The probability that it can cause harm is high.
If you see this file on your hard drive or in Windows Task Manager, please make sure that it is not a malicious variant. It's a fact that many trojans try to cloak their true identity by calling themselves MpFilter.sys. With the above information or by using tools like Security Task Manager you can determine if, in your case, the file is an undesirable variant.
What do other computer users say about MpFilter?
The file spreads very slowly and does not often make an appearance. Therefore, feedback from other users is not yet available.
Summary: source: file.net
How to uninstall Microsoft Malware Protection
To remove MpFilter.sys from your computer, please follow the manual instructions below or use an automatic uninstaller product.
- Click the Windows Start Button. You find it in the lower left corner of the taskbar.
- Type the word uninstall.
- Click Add or remove programs.
- Now locate Microsoft Malware Protection in the list of displayed applications.
- Click the program, and then click Uninstall.
How to tell if MpFilter.sys (MpFilter.sys) was uninstalled cleanly
After uninstalling, restart your computer. Then start Windows Explorer and see if there is still a folder with the name of the software under C:\Program Files. Be sure to check the Registry as well for remnants of MpFilter.sys. To do this, start "Regedit", then look under "HKEY_LOCAL_MACHINE" > "Software" for MpFilter.sys or the name of the producer. Always keep in mind that only a computer professional should ever directly delete entries in the Windows Registry.
What to do if a program does not uninstall
The easiest way to remove any kind of software cleanly and accurately is to use an uninstaller tool. Because the uninstaller automatically creates a backup, there is no risk of anything going wrong.
Last but not least
If Windows not working quite right for you, or if startup is taking a long time, or MpFilter.sys is causing problems for you, a good Windows diagnostic tool may very well help. This is especially effective when it comes to older computers that have accumulated vast quantities of "garbage data" as the result of many software installs and uninstalls.