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 SiSTray.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 SiS Compatible Super VGA Tray Application or SiS 300/305 Super VGA Tray Application belongs to software SiS® Compatible Super VGA SiSTray application or SiS® Compatible Super VGA SiSTray application for Windows (version NT4.0/2000/XP) or SiS VGA Utilities or SiS (version 300/305 SiSTray application for Windows NT 4.0/2000) by Silicon Integrated Systems (www.sis.com).
Description: SiSTray.exe is not essential for Windows and will often cause problems. SiSTray.exe is located in the C:\Windows\System32 folder.
Known file sizes on Windows 10/8/7/XP are 331,776 bytes (30% of all occurrences), 262,144 bytes and 7 more variants.
The file is not a Windows system file. The file is an unknown file in the Windows folder. The program starts when Windows starts (see Registry key: MACHINE\User Shell Folders, MACHINE\Run, User Shell Folders). The program has no visible window. SiSTray.exe is able to record keyboard and mouse inputs. Therefore the technical security rating is 49% dangerous; however you should also read the user reviews.
Recommended: Identify SiSTray.exe related errors
If SiSTray.exe is located in a subfolder of "C:\Program Files", the security rating is 34% dangerous. The file size is 552,960 bytes (62% of all occurrences) or 557,056 bytes. The file is not a Windows system file. The process starts when Windows starts (see Registry key: MACHINE\User Shell Folders, MACHINE\Run, User Shell Folders).
External information from Paul Collins:
There are different files with the same name:
Important: Some malware disguises itself as SiSTray.exe, particularly when not located in the C:\Windows\System32 folder. Therefore, you should check the SiSTray.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 SiSTray. 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 SiSTray.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. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.