What is MainApp.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 MainApp.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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MainApp.exe file information

The process known as P18E UI or Internet Manager belongs to software Mobile Connection Manager or T-Mobile Connection Manager by ZTE CORPORATION (

Description: MainApp.exe is not essential for the Windows OS and causes relatively few problems. The file MainApp.exe is located in a subfolder of "C:\Program Files (x86)" (mostly C:\Program Files (x86)\T-Mobile\InternetManager_Z\Bin\). Known file sizes on Windows 10/8/7/XP are 27,216 bytes (33% of all occurrences), 29,008 bytes or 30,272 bytes. 
The file is a Verisign signed file. The file is digitally signed. The file is not a Windows core file. Therefore the technical security rating is 8% dangerous; however you should also read the user reviews.

Uninstalling this variant: There is a possibility to completely remove T-Mobile Connection Manager or Internet Manager (Control Panel ⇒ Uninstall a Program).

Recommended: Identify MainApp.exe related errors

Important: Some malware camouflages itself as MainApp.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the MainApp.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

It's an Clone DVD 4 componement
  Cedrik Charette   (further information)
A component of CloneDVD is called MainApp.exe
  NozeDive (Tony)   (further information)

Rating chart

Summary: Average user rating of MainApp.exe: based on 7 votes with 2 user comments. 6 users think MainApp.exe is essential for Windows or an installed application. One user suspects danger.

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Best practices for resolving MainApp issues

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

MainApp.exe [all]