One of the files of dynamically connected libraries installed on the computer along with Visual C ++ is called qt5widgets.dll, and its absence or damage can lead to an unforeseen completion of work on or problems during its launch. Within the framework of the current article, we will tell how to solve this problem by intersecting the available methods. You will need to start from the very first option and gradually move to the following if the performed manipulations do not bring the proper effect.
Method 1: Manual Adding Qt5Widgets.dll to System
There is a possibility that the Qt5Widgets.dll once was in Windows, but for some reason was removed or damaged, and the update of Visual C ++ did not correct this problem. It is solved by only one way - manual installation of the missing component. The downloaded file will be needed to move to C: \ Windows \ System32 or in C: \ Windows \ SYSWOW64, according to the discharge of the installed OS, and if the attempt to start the problem software is still unsuccessful, try to register the library manually, using the 3 of our manual.Method 2: Installing or updating Visual C ++
Above, we have already said that the DLL considered is not embedded in the operating system and is added during the installation of the additional component of Visual C ++, therefore this method was put on the second place. It is the most effective and definitely will not harm, because the update or installation of the component mentioned only helps to optimize the operation of the applications and avoid the further appearance of such errors.
Latest Supported Visual C ++ versions for download
- Use the reference to go to the official page of all supported Visual C ++ versions. Here in separate sections are downloaded links. Please note that the 2015, 2017 and 2019 are distributed in the form of one installation file, however, 64-bit windows will need to download and vc_redist.x86.exe, and VC_REDIST.x64.exe.
- Scroll down the down page to find all other supported packages. Download each of them if the component is currently installed at all in your operating system.
- When you click on the link, the download will be immediately started. It will only be left to open the executable file after downloading.
- Confirm the terms of the license agreement, checking the corresponding item, and then click on "Set".
- Expect the installation completion and go to try to start problem software.
Not always the installation of Visual C ++ is successful: sometimes a notification appears on the screen instead with an error of a specific code. In such situations, it is necessary to find this code through the search engine to find a detailed description of the problem of problem on the official website. If this could not be done, write about your difficulty in the comments under this article so that we quickly presented the optimal solution.
Method 3: Re-registration qt5widgets.dll
This method is not always effective, since in most cases the registration of such files is automatically completed without errors. However, its check does not take much time, so if the previous instructions did not bring any results, it is worth making sure that the qt5widgets.dll was registered correctly, and this is done like this:
- Open the "Start" and find the "Command Line" there. You can do it and through "execute" (Win + R), scoring in the CMD window. Use any convenient way to start the console, but it is necessary on behalf of the administrator.
- After opening a new window, insert the REGSVR32 / U QT5WIDGETS.DLL command there and activate it by pressing the Enter key.
- A window will be sure to notify the current file registration or successful cancellation. Close it and enter REGSVR32 / I QT5WIDGETS.DLL to re-register the library.
After the implementation of these actions, you can immediately go to try trying to run problem software or the game, since the changes made do not require a computer reboot.
Method 4: Installing Windows Updates
Installing the missing operating system updates is another way that is not always effective. However, there are situations where, due to the lack of important system updates, Windows encounters conflicts with other additional files, including qt5widgets.dll. Therefore, we strongly recommend checking their presence, because it is very simple.
- Through "Start" and move to "Parameters" by clicking the button in the form of a gear. In the case of Windows 7, you will need to run the "Control Panel" through the same "Start" menu.
- In the window that opens, go to "Update and Security" or "Windows Update".
- The last step will be pressed to "check for updates" and waiting for the completion of the operation.
After detecting updates and install them, you will immediately be notified of this. Now it will only remain to restart the PC so that all changes take into force and the error has been fixed if it really consisted in conflicts of parameters. If suddenly you encounter additional errors or do not understand the topic of installation of updates, read the following thematic materials.
Read more:
Installing Windows 10 Updates
Install updates for Windows 10 manually
Troubleshooting Windows Update Problems
Method 5: Restoring Damaged Windows Files
As part of today's article, we will talk about two methods that are effective extremely rare, but still worth mentioning. The first of them is to verify the integrity of system files. It must be done in order to restore the contents of the directories and get rid of possible problems when you start the software. In most cases, damage to objects does not affect qt5widgets.dll, but it affects its interaction with other components. As a scan tool, it is recommended to select the SFC console utility, and if it completes the error scanning, you must first start the DISM, and then return to this tool. All this is written in the maximum detailed form in a separate material on our website.
Read more: Using and restoring system file integrity check in Windows 10
Method 6: Checking system for viruses
The latter today, the method is involved in testing OS for viruses. It is required to do this because such an infection violates the overall functionality of the computer, and also sometimes interferes with the correct launch of software, causing various errors, including with qt5widgets.dll. Perform this procedure by any convenient tool, and in case of detection of threats, learn Visual C ++ to be re-installed to return all lost files.
Read more: Fighting computer viruses
Now you are familiar with the six methods of troubleshooting with the lack or damage to Qt5Widgets.dll during the launch of the software or games. It remains only in order to follow each instruction to quickly find efficient.