Windows

“This Application Failed To Start Because No Qt…”

If you come across the error “This application failed to start because no Qt…”, Qt must be acting up and you should replace Qt files. Furthermore, you could perform a clean boot,  uninstall and reinstall the affected app, run SFC and DISM scans, remove recent Windows updates, etc. Spare some time to take a look at this article to tackle the error and put your application to good use. 

The Main Questions

User Interface | Qt Creator Manual

What is Qt?

For your information, Qt is a cross-platform software made for creating graphical interfaces as well as cross-platform applications in Windows, Linus, macOS, and Android.

How do I install Qt?

  • Step 1: Go to the Qt website and create an account
  • Step 2: Click Downloads in the left panel, select your preferred version and choose Downloads to get the Qt Installer.
  • Step 3: When the download concludes, press Windows + E to open Quick access, open Downloads and run the Qt Installer.
  • Step 4: Sign in using your Qt account then keep hitting Next. Proceed to choose between Help us to improve by enabling sending pseudonymous usage statistics in Qt Creator and Disable sending pseudonymous usage statistics in Qt Creator then hit Next. You then need to choose the folder where Qt will be installed and the version of Qt that you desire. Afterward, check the Associate common file types with Qt Creator and click Next
  • Step 5: Select the components you want to install and choose Next. Check I have read and agree to the terms contained in the license agreements then hit Next. In the case that everything is up to your liking, click Next and pick Install.

Which versions of Windows does Qt support?

Qt 6.4 supports Windows 10 (1809 or later) and Windows on ARM while Qt 6.2 supports Windows 11. Older versions of Windows are not supported by Qt.

Reasons Why Qt Won’t Work

Overall, Windows applications could run into various errors in use but regarding “This application failed to start because no Qt…”, you should consider the following suspects: 

  • Qt 
  • Third-party apps 
  • Corrupted system files
  • Windows updates

Dealing With Qt Issues: Guidelines

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Replace Qt Files

Note: For ease of convenience, we use Python for the solution. If you experience the error “This application failed to start because no Qt…” while using another app, go the folder of that app. 

  • Step 1: Press Windows + E to open File Explorer, hit This PC and search for pyqt5_tools using the search box on the top-right. 
  • Step 2: Right-click the pyqt5_tools folder then pick Open folder location. 
  • Step 3: Navigate to PyQt5 > Qt > plugins, right-click the platforms folder and pick Copy.
  • Step 4: Right-click the platforms folder and choose Copy
  • Step 5: Go back to the site-packages folder then navigate to pyqt5_tools > Qt > bin. Next, right-click on the empty space in the bin folder, pick Paste and hit Replace the files in the destination message. Last but not least, launch the app then determine whether the issue persists. 

Perform A Clean Boot

  • Step 1: Press Windows key, type msconfig and press Enter to open System Configuration.
  • Step 2: Go to Services tab, select Hide all Microsoft services and choose Disable all.
  • Step 3: Go to the Startup tab, hit Open Task Manager and disable everything in your sight.
  • Step 4: Close Task Manager, return to System Configuration and hit OK.
  • Step 5: Restart your computer. 

If your app launches as expected following clean boot, feel free to conclude that one of the third-party apps is the root of the trouble. To get rid of the error for good, you should uninstall recently installed apps. Finally, you could change back to normal startup by following the steps down below: 

  • Step 1: Press Windows key, type msconfig and press Enter to open System Configuration.
  • Step 2: Click Normal Startup on General tab of System Configuration then click OK.
  • Step 3: Restart your computer. 

Uninstall And Reinstall The Affected App 

  • Step 1: Press Windows + I to open Settings.
  • Step 2: Pick Apps, search for the affected app in Apps & features then click it. 
  • Step 3: Hit Uninstall, follow onscreen instructions and restart your computer. 
  • Step 4: When the screen comes back on, reinstall the app, launch it and see how things turn out. 

Run SFC And DISM Scans

  • Step 1: Press Windows key, type cmd and hit Run as administrator to open Command Prompt with administrative privileges. 
  • Step 2: In Command Prompt (Admin), type sfc /scannow and press Enter to run the SFC scan. 
  • Step 3: The moment the SFC scan completes, type the following commands in Command Prompt (Admin) and press Enter after you finish each to run the DISM scan:
    • DISM /Online /Cleanup-Image /ScanHealth
    • DISM /Online /Cleanup-Image /CheckHealth
    • DISM /Online /Cleanup-Image /RestoreHealth
  • Step 4: Type exit then press Enter to close Command Prompt.
  • Step 5: Restart your computer. 

Remove Recent Windows Updates

  • Step 1: Press Windows + I to open Settings, choose Update & Security and select View update history in Windows Update. 
  • Step 2: Hit Uninstall updates, right-click recent updates and pick Uninstall.
  • Step 3: Restart your computer as soon as the uninstallation wraps up. 

 

Realtek RTL8188EE 802.11bgn Wi-Fi Adapter Not Working

If you notice your Realtek RTL8188EE 802.11bgn Wi-Fi adapter not working, there is a good chance that its driver is outdated and driver update is the best solution. If the issue persists, you should apply changes to power settings, tweak the property of the adapter and so on. Unable to carry out the solutions on your own and could use some help? In that case, you have come to the right palace. 

Getting The Adapter Back To Work: Guidelines

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Update Driver 

  • Step 1: Go to Search bar, type devmgmt.msc and press Enter. 
  • Step 2: In Device Manager, expand Network Adapter, right-click Realtek RTL8188EE 802.11bgn and pick Update driver.
  • Step 3: Hit Search automatically for updated driver software.
  • Step 4: After the update finishes, restart your computer.
  • Step 5: When the screen comes back on, see how things turn out. 

Note: You recently updated the driver of your Realtek RTL8188EE 802.11bgn Wi-Fi adapter? Then it’s suggested that you roll back to the previous driver.

  • Step 1: Go to Search bar, type devmgmt.msc and press Enter. 
  • Step 2: In Device Manager, expand Network Adapter, right-click Realtek RTL8188EE 802.11bgn and pick Properties.
  • Step 3: Go to the Driver tab, hit Roll Back Driver and follow onscreen instructions.
  • Step 4: The moment the rollback completes, restart your computer. 

Depending on the situation, you should uninstall and reinstall the driver.

  • Step 1: Go to Search bar, type devmgmt.msc and press Enter. 
  • Step 2: In Device Manager, expand Network Adapter, right-click Realtek RTL8188EE 802.11bgn and pick Uninstall device. 
  • Step 3: Check the checkbox next to Delete the driver software for this device before hitting OK.
  • Step 4: Restart your computer. 

Change Power Settings 

  • Step 1: Go to Search bar, type devmgmt.msc and press Enter. 
  • Step 2: In Device Manager, expand Network Adapter, right-click Realtek RTL8188EE 802.11bgn and pick Properties.
  • Step 3: Go to the Power Management tab and uncheck the checkbox next to Allow the computer to turn off the device to save power. 
  • Step 4: Hit OK.
  • Step 5: Restart your computer. 

Tweak The Property Of The Adapter

  • Step 1: Go to Search bar, type devmgmt.msc and press Enter. 
  • Step 2: In Device Manager, expand Network Adapter, right-click Realtek RTL8188EE 802.11bgn and pick Properties.
  • Step 3: Go to the Advanced tab, set Property as 802.11n channel width for 2.4GHz and Value as 20MHz Only then hit OK.
  • Step 4: Restart your computer. 
  • Step 5: Witness the result. 

Some Related Questions

How to Turn Your Computer Into a Hotspot

How do I connect to a wireless network? 

  • Step 1: Click the Network icon on the taskbar, select the network you want to connect and hit Connect. 
  • Step 2: Enter the password if needed, select Next and choose Yes or No based on your liking. 
  • Step 3: Wait for the device to connect to the network. 

Is it possible to remove a network from my Windows PC?

  • Step 1: Right-click the Network icon then pick Open Network & Internet settings.
  • Step 2: Choose Wi-Fi on the left panel and select Manage known networks
  • Step 3: Pick the Wi-Fi network that you want to remove and click Forget 

What must be done to troubleshoot network adapter bugs on Windows? 

  • Step 1: Press Windows + I to open Settings.
  • Step 2: Select Update & Security then choose Troubleshoot.
  • Step 3: Click Additional troubleshooters, pick Network adapters and hit Run the Troubleshooter.
  • Step 4: Assuming that the troubleshooter manages to identify the cause, click Apply this fix.

Can I reset TCP/IP

  • Step 1: Go to Search bar, type cmd and hit Run as administrator. 
  • Step 2: In Command Prompt (Admin), run the commands down below:
    • netsh winsock reset
    • ipconfig /release
    • ipconfig /renew
    • netsh int ip reset
    • ipconfig /flushdns
  • Step 3: Restart the computer.

How could I hide the name of Wi-Fi networks? 

  • Step 1: Go to Search bar, type cmd and hit Run as administrator. 
  • Step 2: In Command Prompt (Admin), run the command netsh wlan add filter permission=block ssid=<X> networktype=infrastructure (X is a stand-in for the SSID of the Wi-Fi network that you want to hide).