Windows 7 Sound,video and game controller missing!???

Steps to Fix "No Output Device Installed" Issue:​

1. Reinstall Sound Drivers:
   • Manual Installation:
     • Visit the website of your sound card manufacturer or the motherboard manufacturer (if your sound card is integrated) to download the latest driver for your sound device. Install the driver manually.
     []Windows Update:
     • Check Windows Update for any optional updates related to your audio device. Sometimes, Windows Update can provide the necessary drivers.
   []Enable Plug and Play:
   • Make sure the Plug and Play service is running:
     • Press Windows Key + R to open the Run dialog.
     • Type services.msc and click OK.
     • Find the Plug and Play service, right-click on it, and select Properties. Ensure the service is started and set to Automatic.
   []Check BIOS Settings:
   • Enter your computer's BIOS settings during boot (usually by pressing a specific key like Del or F2).
   • Ensure that the integrated audio controller is enabled in the BIOS settings.
   []Device Manager Troubleshooting:
   • Right-click on the "Unknown Device" under "Other Devices" and select Update Driver Software.
   • Choose to browse your computer for driver software and point it to the location where you downloaded the driver.
   []Use System Restore:
   • If the issue occurred recently, you can try using System Restore to revert your system to a point when the audio was working correctly.
   []Check for Hardware Issues:
   • Ensure that the audio device is properly connected to your computer. If it's an external device, check the cables and connections.
2. Third-Party Tools:
   • Consider using third-party driver update tools like Driver Booster to automatically scan and update outdated or missing drivers.

     Additional Tips:​

     • Ensure that your Windows 7 system is up to date with the latest Windows updates.
     • Run a full system scan using your antivirus software to rule out any malware as a potential cause of the issue.
     Try these steps to see if they help resolve the "No Output Device Installed" problem on your Windows 7 system. Let me know if you need further assistance!