# How to resolve the error "The program can't start because Qt5Widgets.dll is missing from your computer"

April 14, 2016

_by_ [Keith McLaren](/content/articles?author=555a4c08e4b0bbe6b525fd2e/index.html)

This article describes how to resolve the message at Startup:

> The program can't start because Qt5Widgets.dll is missing from your computer.  Try reinstalling the program to fix this problem.

### **_Reason for the Message_**

This problem may occur after removing Malware Bytes due to a run key being left behind which calls programs and DLL's which have been removed.  You can resolve this error by removing the program from the run key in the registry.

### **_Steps to Resolve on x64 Machines_**

1. Open the Registry Editor with the command regedit.exe

2. Navigate to the key:

HKLM\\SOFTWARE\\Wow6432\\Microsoft\\Windows\\CurrentVersion\\Run

3. Review the key and remove any items referring to Malware Bytes or the file "BusinessMessaging.exe"

### **_Steps to Resolve on x86 Machines_**

1. Open the Registry Editor with the command regedit.exe

2. Navigate to the key:

HKLM\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run

3. Review the key and remove any items referring to Malware Bytes or the file "BusinessMessaging.exe"

### **_Additional Information_**

BusinessMessaging.exe is a part of the Malware Bytes software and this run key may get left behind after removal of Malware Bytes.