What is SDIOAssist.exe?

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 SDIOAssist.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.

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SDIOAssist.exe file information

Windows Task Manager with SDIOAssist
SDIOAssist.exe process in Windows Task Manager

The process known as SDIO Assist Service belongs to software O2Micro Flash Memory Card Windows Driver or SDIOAssist service application by O2Micro ( or BayHubTech/O2Micro.

Description: SDIOAssist.exe is not essential for Windows and will often cause problems. The file SDIOAssist.exe is located in a subfolder of C:\Windows. Known file sizes on Windows 10/8/7/XP are 2,701,824 bytes (63% of all occurrences) or 223,848 bytes. 
The program has no visible window. The file is not a Windows system file. SDIOAssist.exe is an unknown file in the Windows folder. SDIOAssist.exe is able to record keyboard and mouse inputs. Therefore the technical security rating is 41% dangerous, however you should also read the user reviews.

Uninstalling this variant: If you have any problems with SDIOAssist.exe, you may also uninstall the software O2Micro Flash Memory Card Windows Driver using the Uninstall a Program function of Windows Control Panel (Windows: Start, Settings, Control Panel, Uninstall a Program) or search the support area on the O2micro website.

Recommended: Identify SDIOAssist.exe related errors

If SDIOAssist.exe is located in the C:\Windows\System32 folder, the security rating is 37% dangerous. The file size is 223,848 bytes (75% of all occurrences) or 2,701,824 bytes. The program has no visible window. The SDIOAssist.exe file is not a Windows core file. SDIOAssist.exe is a Verisign signed file. The file has a digital signature. SDIOAssist.exe is able to record keyboard and mouse inputs.

Important: Some malware camouflages itself as SDIOAssist.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the SDIOAssist.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.


User Comments

Process sdioassist.exe This file is the main executable for the SDIO Assist service application for MS Windows, developped by O2Micro Inc. - check more on sdioassist.exe is filename of the process running on Microsoft Windows operating system. This process belongs in most cases to product SDIOAssist service application and is developed by O2Micro. company. File version information describes this process as SDIOAssist. Process is in most cases loaded from directory C:\Windows\SysWOW64.
  Bubba Ganush   (further information)
causing tones to be repatedly played on pc

Summary: Average user rating of SDIOAssist.exe: based on 2 votes with 2 user comments. One user thinks it's probably harmless. One user thinks it's neither essential nor dangerous. One user is not sure about it.

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Best practices for resolving SDIOAssist issues

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

Other processes

SDIOAssist.exe [all]