Most antivirus programs identify msinet.exe as malware—for instance F-Secure identifies it as Gen:Trojan.Heur.YyGcrTm2eBaiy, and Avast identifies it as Win32:Trojan-gen.
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Description: Msinet.exe is not essential for Windows and will often cause problems. The msinet.exe file is located in a subfolder of C:\Windows\System32.
The file size on Windows 10/8/7/XP is 822,272 bytes.
There is no description of the program. It is located in the Windows folder, but it is not a Windows core file. The program has no visible window. The program listens for or sends data on open ports to a LAN or the Internet. The file is not a Windows core file. Msinet.exe is able to hide itself and manipulate other programs. Therefore the technical security rating is 90% dangerous.
Recommended: Identify msinet.exe related errors
If msinet.exe is located in the C:\Windows\System32 folder, the security rating is 48% dangerous. The file size is 69,632 bytes. The program has a visible window. The program starts when Windows starts (see Registry key: MACHINE\Run). The software uses ports to connect to or from a LAN or the Internet. The file is not a Windows system file. msinet.exe appears to be a compressed file.
External information from Paul Collins:
Important: You should check the msinet.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 msinet process on your computer and clearly tells you what it is doing. Malwarebytes' well-known anti-malware tool tells you if the msinet.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.