Most antivirus programs identify twain_32.exe as malware—such as Microsoft identifies it as Trojan:Win32/Cropo.B or VirTool:Win32/VBInject.gen!ET, and Kaspersky identifies it as Trojan.Win32.Agent.bea or Worm.Win32.AutoRun.caeq.
The twain_32.exe file is a software component of Default Scanning Tool by Microsoft.
An addin included with versions of Windows versions up to and including XP, this application is a simple scanning utility that integrates with a variety of other image applications. It allows you to view the results of a scan preview, as well as scan a full image that is then output to an image program. Founded in 1975, Microsoft's flagship product is the Windows operating system, which is installed on over 90% of workstations worldwide.
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Description: Twain_32.exe is not essential for Windows and will often cause problems. Twain_32.exe is located in the C:\Windows folder.
The file size on Windows 10/8/7/XP is 15,360 bytes.
The twain_32.exe file is a file with no information about its developer. The twain_32.exe file is an unknown file in the Windows folder. The program has no visible window. The program starts when Windows starts (see Registry key: MACHINE\Run). Twain_32.exe is not a Windows system file. Twain_32.exe is able to monitor applications. Therefore the technical security rating is 77% dangerous, however you should also read the user reviews.
Recommended: Identify twain_32.exe related errors
If twain_32.exe is located in a subfolder of C:\Windows\System32, the security rating is 58% dangerous. The file size is 328,531 bytes. There is no description of the program. Twain_32.exe is an unknown file in the Windows folder. The program has no visible window. It is not a Windows core file. twain_32.exe appears to be a compressed file.
Important: You should check the twain_32.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.
The following programs have also been shown useful for a deeper analysis: Security Task Manager examines the active twain_32 process on your computer and clearly tells you what it is doing. Malwarebytes' well-known anti-malware tool tells you if the twain_32.exe on your computer displays annoying ads, slowing it down. This type of unwanted adware program is not considered by some antivirus software to be a virus and is therefore not marked for cleanup.
A clean and tidy computer is the key requirement for avoiding PC trouble. 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.