What is UStorSrv.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 UStorSrv.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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UStorSrv.exe file information

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

The process known as OTi Content Service belongs to software OTi Content Service or UStorage Server Service or BJC-4300 by OTi (

Description: UStorSrv.exe is not essential for Windows and will often cause problems. The UStorSrv.exe file is located in the C:\Windows\System32 folder or sometimes in a subfolder of C:\Windows. Known file sizes on Windows 10/8/7/XP are 139,264 bytes (98% of all occurrences) or 143,360 bytes. 
The program has no visible window. The file is not a Windows core file. The UStorSrv.exe file is located in the Windows folder, but it is not a Windows core file. The program uses ports to connect to or from a LAN or the Internet. Therefore the technical security rating is 68% dangerous, however you should also read the user reviews.

Recommended: Identify UStorSrv.exe related errors

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

I also have the file and a Imation Flash drive which I installed on the date when my Anit Virus first detected this program. I don't know of any vulnerabilities or subsequent exploitations.
Came with the Transcend JetFlash USB Drive utilities.
related to "imation" USB flash drive
Likely related to U-storage app for memory stick. Curious thing is that software is on the PC for over 2 years. In that time there have been no changes in how memory stick is configured. And only now an .exe with this name tries to get access to internet. Last time the memory stick was connected to the PC is weeks ago, PC has been rebooted countless times since then. Running McAfee antivirus and F/W, all up to date.
Found it on a DSE usb drive, looks harmless but not sure
It's obviously a USB Flash, Jump, Thumb, or similar type device that auto installs as a Windows XP Service. It can be [Disabled] by Right-Clicking the 'My Computer' Icon/Menu choice, and Selecting the 'Manage' menu choice. Just click the 'Services' , click to change the view to 'Standard', Scroll down,, highlight the 'UStorSrv.exe, then click to 'Disable'. After it's disabled, Restart the PC, then Search for the "UStorSrv.exe", Delete it, and Empty your Recycle Bin. You must also edit the 'Registry - via "regedit", Find each folder, or entry, and delet as well. Finally, delete from win dir.
Seems to have arrived with Imation Disk Manager - Killed proess and renamed ustorserv.exe in c:\windows\system32
I got this with my Imation flash drive stick. I reformated the stick which erased the "OTi Content Service" program (which is a log file) so I did not have to keep deleting it out my system32 file every time I put the stick in my usb port,
  Bet It All Die Broke  
More comments can be found here:
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Rating chart

Summary: Average user rating of UStorSrv.exe: based on 46 votes with 9 reviews. 13 users think UStorSrv.exe is essential for Windows or an installed application. 6 users think it's probably harmless. 21 users think it's neither essential nor dangerous. 2 users suspect danger. 4 users think UStorSrv.exe is dangerous and recommend removing it. 13 users don't grade UStorSrv.exe ("not sure about it").

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Best practices for resolving UStorSrv issues

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

UStorSrv.exe [all]