What is mainserv.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 mainserv.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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Mainserv.exe file information

Windows Task Manager with mainserv
Mainserv.exe process in Windows Task Manager

The process known as Battery Backup Management Service or Battery backup management service belongs to software PowerChute Personal Edition or APC PowerChute Personal Edition by Schneider Electric ( or American Power Conversion (

Description: Mainserv.exe is not essential for the Windows OS and causes relatively few problems. Mainserv.exe is located in a subfolder of "C:\Program Files (x86)"—common is C:\Program Files (x86)\APC\APC PowerChute Personal Edition\ or C:\Program Files (x86)\APC\PowerChute Personal Edition\. Known file sizes on Windows 10/8/7/XP are 705,912 bytes (41% of all occurrences), 689,408 bytes, 176,193 bytes, 176,241 bytes or 155,770 bytes. 
The process is a service, and the service name is APC UPS: PowerChute Personal Edition service for managing battery backup power events.
The program is not visible. The file is not a Windows core file. The file has a digital signature. The file is a Verisign signed file. Mainserv.exe is able to hide itself, monitor applications and record keyboard and mouse inputs. Therefore the technical security rating is 35% dangerous, but you should also take into account the user reviews.

Uninstalling this variant: The software vendor offers the option to look for help on the website, see if there is a newer version or uninstall the program using the Control Panel ⇒ Uninstall a ProgramPowerChute Personal Edition or APC PowerChute Personal Edition.

Recommended: Identify mainserv.exe related errors

External information from Paul Collins:

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

APC UPS Control
From APC to manage APCs
After installing APC PowerChute P/E software, task manager showed mainserv.exe using 99% of my system resources! I removed the APC program & just left the hardware in use.
  Zion Lutheran Church/Judy Killmer, Contact  
Came with APC UPS. Was causing interrupts to lock, in other words my controls were sticking while playing games.
APC Powerchute service. Essential if you want managed shutdown by your APC UPS. Non-essential, if you don't care. The battery backup hardware works without it. Make sure mainserv.exe is located where you installed you Powerchute software and not in a \Windows subfolder.
Quite safe, needed only if you have an APC ups.
  J.P. Thérien  
Belongs to PowerChute (APS)
On installation, was using 99% of my resources too. I emailed APC and was directed to an updated software file. Now it uses a negligible amount except during self-tests.
  Maxmeri   (further information)
Very little overhead and protected vital info and later let me know about it so I could correct the power problem in the morning. Is a savior.
APC Battery backup uses very little resources and helps you get the most out of your battery backup
  Mdekc   (further information)

Rating chart

Summary: Average user rating of mainserv.exe: based on 12 votes with 11 user comments. 8 users think mainserv.exe is essential for Windows or an installed application. 3 users think it's neither essential nor dangerous. One user suspects danger.

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Best practices for resolving mainserv issues

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

mainserv.exe [all]