What is SiSPower.dll?

SiSPower.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 SiSPower.dll is a Windows system file or if it belongs to an application that you can trust.

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SiSPower.dll file information

The process known as Dynamic link library for setting Power Scheme belongs to software SiS Power Scheme Library by Silicon Integrated Systems (

Description: SiSPower.dll is not essential for the Windows OS and causes relatively few problems. SiSPower.dll is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 49,152 bytes (66% of all occurrences) or 53,248 bytes. 
The program has a visible window. The software is loaded during the Windows boot process (see Registry key: MACHINE\Run, Run). The SiSPower.dll file is not a Windows system file. SiSPower.dll appears to be a compressed file. Therefore the technical security rating is 23% dangerous, however you should also read the user reviews.

Recommended: Identify SiSPower.dll related errors

Important: Some malware disguises itself as SiSPower.dll, particularly when not located in the C:\Windows\System32 folder. Therefore, you should check the SiSPower.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.


User Comments

is held within the system registry files
    (further information)
This showed up when I updated my sis chipset drivers, alond with sis raid.
It's needed for windows to run. a lot of new xp's don't have it on startup but sometimes it just appears there. leave it on start up would be good
  Dark_Mercy29   (further information)
antivirus software find it
It belongs to the power-management of SiS-chipset, and is not mandatory, you can delete it, if you want
power management for sis chipsets
Power managing for SiS chipsets

Rating chart

Summary: Average user rating of SiSPower.dll: based on 12 votes with 7 user comments. 8 users think SiSPower.dll is essential for Windows or an installed application. 2 users think it's probably harmless. One user thinks it's neither essential nor dangerous. One user thinks SiSPower.dll is dangerous and recommends removing it. 2 users don't grade SiSPower.dll ("not sure about it").

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Best practices for resolving SiSPower issues

A clean and tidy computer is the key requirement for avoiding problems with SiSPower. 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 SiSPower.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.

Other processes

SiSPower.dll [all]