What is Reg.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 Reg.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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Reg.exe file information

Windows Task Manager with Reg
Reg.exe process in Windows Task Manager

The process known as Reg MFC Application or Registry Console Tool belongs to software Microsoft Windows Operating System or 108Mbps Wireless LAN Adapter or D-Link AirPlus G Wireless or D-Link AirPlus Xtreme G Adapter by Microsoft (

Description: Reg.exe is not essential for Windows and will often cause problems. The file Reg.exe is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 24,576 bytes (50% of all occurrences), 28,672 bytes and 4 more variants. 
It is a file with no information about its developer. The program starts upon Windows startup (see Registry key: MACHINE\User Shell Folders, User Shell Folders, DEFAULT\Runonce, Userinit). The Reg.exe file is not a Windows core file. The program has a visible window. Reg.exe is able to record keyboard and mouse inputs. Therefore the technical security rating is 27% dangerous, however you should also read the user reviews.

Uninstalling this variant: If problems with 108Mbps Wireless LAN Adapter or DWL-G520M Wireless 108G MIMO occur, you can also remove the entire program using Windows Control Panel.

Recommended: Identify Reg.exe related errors

Important: Some malware camouflages itself as Reg.exe. Therefore, you should check the Reg.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

Commonly found with D-Link Wireless Driver Install. D-Link's version frequently breaks and goes into 100% CPU mode. Best thing to do is to rename the REG.EXE file to REG.EXE.disabled.
If D-Link DWL-G630 utility tries to install with Texas Instrument PCMCIA adapter, it will hang up and not finish the D-link registry update. Although your wireless adapter may still work, REG.EXE from the D-link subdirectory will execute each time you reboot, get hung up again, and cause your Win 2000 services.exe to us 90-100% of your CPU time. I removed the D-link REG.EXE from my windows registry and window and DWL-G630 works fine.
  dasai   (further information)
This is used during many D-Link Wireless Driver Installations. It is not required after the install and can be removed with out harm. It will often cause your CPU to Run at 100% and peak your Services.exe in task manager. I have removed REG.exe and my laptop runs much better.
  Netwrkengeer   (further information)
its aedan antivirus, from what i can tell, its based on Avast!
  Bob   (further information)
It is a required system file.
  Sam   (further information)
i am make a reg.exe file. just install it ur reg changed
  Maria   (further information)
Wenn ich mit xp-Clean Spyware finde und entferne dann wird in der Infoleiste mit hoher Geschwindigkeit ein DOS-Fenster geöffnet und C:Windows\system32\reg.exe ausgeführt. Ich kann es nicht nachvollziehen. Sofort wiederholter Spywarescann findet wieder dieselbe Spyware im Schlüssel HKEY_LOCAL_MACHINE SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{FF905E0C-CFE9-4A90-AFFF-C13AF5D908F0}, wenn ich die Registrierung öffne um diesen Eintrag zu sehen ist er nicht da oder unsichtbar. Beim löschen mit xp-Clean wird dann wieder in der Infoleiste für eine Sekunde reg.exe ausgef

Rating chart

Summary: Average user rating of Reg.exe: based on 7 votes with 8 user comments. 3 users think Reg.exe is essential for Windows or an installed application. One user thinks it's probably harmless. 3 users think Reg.exe is dangerous and recommend removing it. 2 users don't grade Reg.exe ("not sure about it").

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Best practices for resolving Reg issues

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

Reg.exe [all]