What is sm1bg.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 sm1bg.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.

Click to Run a Free Scan for sm1bg.exe related errors

Sm1bg.exe file information

Windows Task Manager with sm1bg
Sm1bg.exe process in Windows Task Manager

The process known as Cypress USB Mass Storage Driver Background Application belongs to software Cypress USB Mass Storage Adapter by Cypress Semiconductor (

Description: Sm1bg.exe is not essential for the Windows OS and causes relatively few problems. The file sm1bg.exe is located in the C:\Windows folder or sometimes in a subfolder of C:\Windows. The file size on Windows 10/8/7/XP is 94,208 bytes. 
Sm1bg.exe is not a Windows system file. The program is not visible. The application starts when Windows starts (see Registry key: MACHINE\Run). The sm1bg.exe file is a Microsoft signed file. Sm1bg.exe is able to record keyboard and mouse inputs. Therefore the technical security rating is 38% dangerous, however you should also read the user reviews.

Recommended: Identify sm1bg.exe related errors

External information from Paul Collins:

Important: Some malware disguises itself as sm1bg.exe, particularly when not located in the C:\Windows folder. Therefore, you should check the sm1bg.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

Appeared after installing Napster. Used by Napster App
  pop pop  
If you installed Napster, this is the USB driver to detect an MP3 player if connected.
  Oliver Dutta   (further information)
Is installed with Napster, iTunes, and some usb memory readers
either for my mass storage or for roxio 7.5 emc
  just some guy  
Is used to run mass storage USB devices, harmless, but not required to run said devices.
Mass storage, 9 in 1 reader system

Rating chart

Summary: Average user rating of sm1bg.exe: based on 12 votes with 7 user comments. 8 users think sm1bg.exe is essential for Windows or an installed application. 4 users think it's neither essential nor dangerous. One user is not sure about it.

Do you have additional information?
What do you know about sm1bg.exe:
How would you rate it:
Link for more info:
Your Name:

Best practices for resolving sm1bg issues

A clean and tidy computer is the key requirement for avoiding problems with sm1bg. 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 sm1bg.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.

Other processes

sm1bg.exe [all]