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 WinSys.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.
The process known as DOT MFC Application or Aurthor: Ben Nelson or Stub or Module or WinLog Daemon Service
belongs to software DOT Application or Winlog or winsys32 or Windows mngr or NNC module
by Microsoft (www.microsoft.com) or NoName or Daemon (www.daemon-tools.cc) or MLabs (www.mlabs.com).
Description: WinSys.exe is not essential for Windows and will often cause problems. The file WinSys.exe is located in the C:\Windows\System32 folder.
Known file sizes on Windows 10/8/7/XP are 135,168 bytes (50% of all occurrences), 200,704 bytes and 6 more variants.
The software has no file description. WinSys.exe is not a Windows core file. The program has no visible window. WinSys.exe is located in the Windows folder, but it is not a Windows core file. The program starts upon Windows startup (see Registry key: MACHINE\Run, Run, MACHINE\RunServices, Winlogon\Shell, DEFAULT\Run). WinSys.exe is able to record keyboard and mouse inputs. Therefore the technical security rating is 63% dangerous, however you should also read the user reviews.
Recommended: Identify WinSys.exe related errors
If WinSys.exe is located in the C:\Windows folder, the security rating is 82% dangerous. The file size is 12,288 bytes (47% of all occurrences), 8,704 bytes and 7 more variants. There is no information about the author of the file. The file is not a Windows core file. The WinSys.exe file is an unknown file in the Windows folder. The program has no visible window. WinSys.exe is able to record keyboard and mouse inputs, manipulate other programs, monitor applications and connect to the Internet.
If WinSys.exe is located in a subfolder of the user's profile folder, the security rating is 59% dangerous. The file size is 631,296 bytes (33% of all occurrences), 28,160 bytes, 548,864 bytes, 155,757 bytes or 648,192 bytes. The WinSys.exe file is not a Windows system file. The program is not visible. The software starts upon Windows startup (see Registry key: MACHINE\Run, Run, MACHINE\RunServices, Winlogon\Shell, DEFAULT\Run).
If WinSys.exe is located in a subfolder of "C:\Program Files", the security rating is 43% dangerous. The file size is 739,608 bytes (50% of all occurrences) or 361,984 bytes.
If WinSys.exe is located in a subfolder of C:\Windows, the security rating is 88% dangerous. The file size is 49,152 bytes.
If WinSys.exe is located in a subfolder of Windows folder for temporary files, the security rating is 64% dangerous. The file size is 658,944 bytes.
If WinSys.exe is located in a subfolder of C:\Windows\System32, the security rating is 70% dangerous. The file size is 3,415,040 bytes.
External information from Paul Collins:
There are different files with the same name:
Important: Some malware camouflages itself as WinSys.exe, for example W32.SillyFDC or Adware.Gen (detected by Symantec), and Worm:Win32/Autorun.BZ or VirTool:Win32/VBInject (detected by Microsoft). Therefore, you should check the WinSys.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.
A clean and tidy computer is the key requirement for avoiding problems with WinSys. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic 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 resmon 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 DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.
To help you analyze the WinSys.exe process on your computer, the following programs have proven to be helpful: Security 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. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.