What is mcbuilder.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 mcbuilder.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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Mcbuilder.exe file information

Windows Task Manager with mcbuilder
Mcbuilder.exe process in Windows Task Manager

The process known as Resource cache builder tool belongs to software Microsoft Windows Operating System by Microsoft (

Description: Mcbuilder.exe is an important part of Windows, but often causes problems. The file mcbuilder.exe is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 297,984 bytes (33% of all occurrences), 300,032 bytes and 4 more variants. 
Mcbuilder.exe is a Windows system file. The program is not visible. It is a Microsoft signed file. Therefore the technical security rating is 4% dangerous, however you should also read the user reviews.

Recommended: Identify mcbuilder.exe related errors

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

My mcbuilder.exe was eating too much CPU. Takes some time to figure out that the problem was comodo memory firewall doing something. Uninstall comodo and everything works ok now.
mcbuilder.exe was running and seemed to be gobbling harddrive seek time and some cpu. by the time i highlighted it in task manager to see what was going on, it disappeared. SOME VERSIONS OF THE program at not exactly size above, BUT are close to the size and in other directories.
  former computer course teacher  
There is a Virus/mailware called MCbuilder that is usually located at C/user/username/appdata/Roaming/microsoft/windows/IEupdater. once you have it it will try to run itself if you have firewall it will ask you to run it and won't let you to press no. when it is already installed it will slow down your PC by using most of your CPU and causing other problems. It is pretty tricky to get rid of it as most antiviruses can't detect it until it's already ruining on your PC so you will have to delete it manually together with all of it's registrations keys.

Summary: Average user rating of mcbuilder.exe: based on 3 votes with 3 user comments. 2 users think mcbuilder.exe is essential for Windows or an installed application. One user thinks mcbuilder.exe is dangerous and recommends removing it.

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Best practices for resolving mcbuilder issues

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

mcbuilder.exe [all]