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 si.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.
Description: Si.exe is not essential for the Windows OS and causes relatively few problems. Si.exe is located in the C:\Windows\System32 folder.
The file size on Windows 10/8/7/XP is 29,440 bytes.
Si.exe is a file with no information about its developer. It is located in the Windows folder, but it is not a Windows core file. The program is not visible. The software starts upon Windows startup (see Registry key: MACHINE\Run). The file is not a Windows core file. Si.exe is able to hide itself. Therefore the technical security rating is 80% dangerous.
Recommended: Identify si.exe related errors
If si.exe is located in a subfolder of C:\Windows\System32, the security rating is 72% dangerous. The file size is 808,960 bytes. The si.exe file is a file with no information about its developer. The file is located in the Windows folder, but it is not a Windows core file. The program is not visible. The file is not a Windows core file. Si.exe is able to record keyboard and mouse inputs.
If si.exe is located in a subfolder of the user's profile folder, the security rating is 36% dangerous. The file size is 814,240 bytes. The program has no visible window. The file is certified by a trustworthy company. Si.exe is not a Windows core file.
Important: Some malware camouflages itself as si.exe. Therefore, you should check the si.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 si. 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 si.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.