What is VSApiNt?

VSApiNt.sys is a Windows driver. A driver is a small software program that allows your computer to communicate with hardware or connected devices. This means that a driver has direct access to the internals of the operating system, hardware etc. The free file information forum can help you determine if VSApiNt.sys is a Windows system file or if it belongs to an application that you can trust.

Run a free scan to check for VSApiNt drivers in need of updating

VSApiNt.sys file information

The process known as VsapiNT belongs to software VSAPI or Trend Micro OfficeScan Client by Trend Micro (

Description: VSApiNt.sys is not essential for the Windows OS and causes relatively few problems. VSApiNt.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 1,169,240 bytes (50% of all occurrences), 1,195,448 bytes or 1,022,432 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The software has no file description. The program has no visible window. VSApiNt.sys is not a Windows system file. There is no detailed description of this service. The VSApiNt.sys file is a Verisign signed file. The file is digitally signed. VSApiNt.sys is able to hide itself, monitor applications and manipulate other programs. Therefore the technical security rating is 18% dangerous, however you should also read the user reviews.

Recommended: Identify VSApiNt.sys related errors

If VSApiNt.sys is located in a subfolder of "C:\Program Files", the security rating is 24% dangerous. The file size is 1,405,720 bytes. The file is a file with no information about its developer. The program is not visible. The service has no detailed description. The file is not a Windows system file. VSApiNt.sys is a Verisign signed file. The file has a digital signature. VSApiNt.sys is able to hide itself, monitor applications and manipulate other programs.

Uninstalling this variant: If there are any problems with VSApiNt.sys, you can do the following:
  1) uninstall Trend Micro OfficeScan Client software via Windows Control Panel/Add or Remove Programs (Windows XP) or Programs and Features (Windows 10/8/7)
  2) turn to the software company, Trend, for advice.

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

Erzeugt BlueScreen während der Installation von XPSP2
Trend Micro OfficeScan Client
system32\DRIVERS\vsapint.sys (autostart)
Trend Micro OfficeScan Client

Summary: Average user rating of VSApiNt.sys: based on 3 votes with 4 user comments. 3 users think VSApiNt.sys is essential for Windows or an installed application. One user is not sure about it.

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Best practices for resolving VSApiNt issues

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

VSApiNt.sys [all]