Fix sound or audio problems in Windows Fix microphone problems in Windows Fix audio issues when no sound plays from speakers or headphones in Windows Fix missing or undetected audio output device in Windows Fix audio stops working after a Windows update in Windows Fix low or quiet sound in Windows Fix distorted or crackling audio in Windows Fix app audio not working while system sounds work in Windows Update Audio drivers in Windows Fix Bluetooth problems in Windows Fix Bluetooth audio only playing in one channel Fix Bluetooth disappeared in Windows Troubleshoot Bluetooth not connecting in Windows Troubleshoot transferring files using Bluetooth Fix Bluetooth connected but no sound issue on Windows Bluetooth keeps disconnecting in Windows Update Bluetooth drivers in Windows Camera doesn't work in Windows Fix a missing Camera Roll in Windows Camera app shows error 0xA00F4244 NoCamerasAreAttached Manage cameras with Camera settings in Windows 11 How to use the Windows Camera app A driver can't load on this device Error codes in Device Manager in Windows Your CD or DVD drive is not recognized by Windows or other programs Fix printer connection and printing problems in Windows Troubleshooting offline printer problems in Windows Fix printer not found and printer not recognized errors in Windows Fix print job stuck in queue errors in Windows Fix printer stopped due to paper jam errors in Windows Troubleshoot slow printing issues in Windows Fix print spooler service not running errors in Windows Fix poor print quality in Windows (Blurry, faded, or streaked prints) Fix printing problems in Word, Excel, or other apps Fix printer driver compatibility issues in Windows Fix shared printer connection problems in Windows Fix USB-C problems in Windows Troubleshoot problems updating Windows Get help with Windows upgrade and installation errors Windows 10 Upgrade Assistant is stuck at 99% The notification \"What needs your attention\" displays during a Windows upgrade Find lost files after upgrading Windows Using the Windows Activation troubleshooter Solve PC problems remotely using Quick Assist There are many reasons why you might receive an error message when upgrading or installing Windows 11, but common errors can be fixed with a few steps that you can do on your own. An upgrade takes your device from an older version of Windows, such as Windows 7, Windows 8.1, or Windows 10 to Windows 11. Before searching for a specific error code, try the tips listed in General fixes . If those don't fix your upgrade or installation problem, check the table of error codes at the bottom of this article. Here are some things you can try to fix upgrade and installation errors: Remove external hardware Unplug any nonessential hardware devices. These could include headphones, printers, scanners speakers, USB flash drives, and external hard drives. If you’re using a laptop and it’s plugged in to a docking station, undock it. It’s a good idea to make sure that all important updates are installed before trying to upgrade Windows. This includes updates to hardware drivers on your device. For information and to make sure you're up-to-date, see Windows Update: FAQ . Uninstall non-Microsoft antivirus software Use Windows Defender to protect your device during the upgrade—non-Microsoft antivirus software can sometimes cause upgrade problems. As long as you have installation media and all required activation information, you can always reinstall the software after you upgrade. To remove an antivirus application, go to Control Panel\Programs\Programs and Features . Select the program, and then select Uninstall . Select Yes to confirm. Uninstall nonessential software Outdated software can cause problems with a Windows upgrade, so removing old or nonessential applications can help. If you plan to reinstall the application later, make sure you have the installation media and all required activation information before removing it. To uninstall software, go to Control Panel\Programs\Programs and Features . Select the program, and then select Uninstall . Select Yes to confirm. Free up disk space To upgrade to Windows 11, you need enough space on your hard drive for the installation to take place. To view how much hard drive space is available on your computer, select File Explorer on the taskbar (known as Windows Explorer in Windows 7) or press Windows logo key + E . Then select Computer or This PC and look under Hard Disk Drives or under Devices and drives . If there are multiple drives listed, the system drive is the drive that includes a Microsoft Windows logo above the drive icon. You’ll see the amount of available space under the drive. If it looks like your drive is running low on space, see Tips to free up drive space on your PC . 0xC1900101 Errors An error that begins with 0xC1900101 is usually a driver error. If you see any of these error codes, try the following steps first to fix the problem. If these steps don’t work, see Resolve Windows upgrade errors for more detailed technical info. 0xC1900101 - 0x2000c 0xC1900101 - 0x20017 0xC1900101 - 0x30018 0xC1900101 - 0x3000D 0xC1900101 - 0x4000D 0xC1900101 - 0x40017 Make sure that your device has enough space. Your device requires at least 16 GB of free space to upgrade a 32-bit OS, or 20 GB for a 64-bit OS. For more info, see Free up drive space in Windows . Make sure that your device has enough space. Your device requires at least 16 GB of free space to upgrade a 32-bit OS, or 20 GB for a 64-bit OS. For more info, see Free up drive space in Windows . Run Windows Update a few times. Download and install any available updates in Windows Update, including software updates, hardware updates, and some third-party drivers. Use the Windows Update Troubleshooter to fix Windows 11 Update errors. Run Windows Update a few times. Download and install any available updates in Windows Update, including software updates, hardware updates, and some third-party drivers. Use the Windows Update Troubleshooter to fix Windows 11 Update errors. Check third-party drivers and download any updates. You can find third-party drivers and installation instructions for any hardware you’ve added to your device on the manufacturer’s website. Check third-party drivers and download any updates. You can find third-party drivers and installation instructions for any hardware you’ve added to your device on the manufacturer’s website. Unplug extra hardware. Remove all external storage devices and drives, docks, and other hardware you might have plugged into your device that isn’t needed for basic functionality. Unplug extra hardware. Remove all external storage devices and drives, docks, and other hardware you might have plugged into your device that isn’t needed for basic functionality. Check Device Manager for errors. In the search box on the taskbar, type device manager . Choose Device Manager from the results. In the window that pops up, look for any device with a yellow exclamation mark beside it (you may have to select each category to switch to the list of devices). Press and hold (or right-click) the device name and select either Update Driver Software or Uninstall to correct the errors. Check Device Manager for errors. In the search box on the taskbar, type device manager . Choose Device Manager from the results. In the window that pops up, look for any device with a yellow exclamation mark beside it (you may have to select each category to switch to the list of devices). Press and hold (or right-click) the device name and select either Update Driver Software or Uninstall to correct the errors. Remove third-party security software. Make sure you know how to reinstall your programs and that any necessary product keys are on hand. Windows Defender will help protect your device in the meantime. Remove third-party security software. Make sure you know how to reinstall your programs and that any necessary product keys are on hand. Windows Defender will help protect your device in the meantime. Repair hard-drive errors. In the search box on the taskbar, type command prompt . Choose Command Prompt from the list of results. In the window that pops up, type chkdsk/f C: and press the Enter key. Repairs automatically start on your hard drive, and you’ll be asked to restart your device. Note You must have administrator permissions on your device to do this. Repair hard-drive errors. In the search box on the taskbar, type command prompt . Choose Command Prompt from the list of results. In the window that pops up, type chkdsk/f C: and press the Enter key. Repairs automatically start on your hard drive, and you’ll be asked to restart your device. You must have administrator permissions on your device to do this. Do a clean restart into Windows. See How to perform a clean boot in Windows . Do a clean restart into Windows. See How to perform a clean boot in Windows . Restore and repair system files. In the search box on the taskbar, type command prompt . Choose Command Prompt from the list of results. In the window that pops up, type DISM.exe /Online /Cleanup-image /Restorehealth and press the Enter key. ( Learn to repair a Windows image ) Note You must have administrator permissions on your device to do this. Restore and repair system files. In the search box on the taskbar, type command prompt . Choose Command Prompt from the list of results. In the window that pops up, type DISM.exe /Online /Cleanup-image /Restorehealth and press the Enter key. ( Learn to repair a Windows image ) You must have administrator permissions on your device to do this. Other Common Errors The following table lists the most common upgrade and installation errors and some things you can try to fix them. If you continue having problems upgrading or installing Windows, contact Microsoft support .

Select Start > Settings > Windows Update > Update history . Run the Windows Update troubleshooter. Ensure your system is fully updated. Use the System File Checker (SFC) and DISM tool. Use the Disk Cleanup tool to clear up space. Check for issues with your hard drive. Reset Windows Update components. Restart your computer and try again. Disable antivirus temporarily during installation. Close unnecessary applications running in the background Ensure you have a stable internet connection. Restart the update process. Check for network issues or firewall settings blocking the update Run the System File Checker (sfc /scannow). Perform a clean boot and try again. Check if Windows Update services are running. Run Windows Update Troubleshooter. Reset Windows Update components. Clear Windows Update cache. Disconnect any external devices during installation. Try upgrading in Safe Mode. Ensure all drivers are up-to-date. Delete temporary update files. Restart the Windows Update service. Use the Windows Update Troubleshooter. Run Windows Update Troubleshooter. Use the DISM tool to repair corrupted system files. Reset Windows Update components. Restart the PC and try again. Run the Windows Update Troubleshooter. Try upgrading in Safe Mode. Disable antivirus software during installation. Run the Windows Update troubleshooter. Check for any Windows permissions issues. Ensure your internet connection is stable. Check if Windows Update servers are down. Use the Windows Update Troubleshooter. Ensure that Windows Update service is enabled. Start the Windows Update service manually. Reset the Windows Update components. Support for Windows 10 has ended on October 14, 2025 After October 14, 2025, Microsoft will no longer provide free software updates from Windows Update, technical assistance, or security fixes for Windows 10. Your PC will still work, but we recommend moving to Windows 11. There are many reasons why you might receive an error message when upgrading or installing Windows 10, but common errors can be fixed with a few steps that you can do on your own. Note: An upgrade takes your device from an older version of Windows, such as Windows 7 or Windows 8.1, to Windows 10. Before searching for a specific error code, try the tips listed in General fixes . If those don't fix your upgrade or installation problem, check the table of error codes at the bottom of this article. Here are some things you can try to fix upgrade and installation errors: Remove external hardware Unplug any nonessential hardware devices. These could include headphones, printers, scanners speakers, USB flash drives, and external hard drives. If you’re using a laptop and it’s plugged in to a docking station, undock it. It’s a good idea to make sure that all important updates are installed before trying to upgrade Windows. This includes updates to hardware drivers on your device. For information and to make sure you're up-to-date, see Windows Update: FAQ . Uninstall non-Microsoft antivirus software Use Windows Defender to protect your device during the upgrade—non-Microsoft antivirus software can sometimes cause upgrade problems. As long as you have installation media and all required activation information, you can always reinstall the software after you upgrade. To remove an antivirus application, go to Control Panel\Programs\Programs and Features . Select the program, and then select Uninstall . Select Yes to confirm. Uninstall nonessential software Outdated software can cause problems with a Windows upgrade, so removing old or nonessential applications can help. If you plan to reinstall the application later, make sure you have the installation media and all required activation information before removing it. To uninstall software, go to Control Panel\Programs\Programs and Features . Select the program, and then select Uninstall . Select Yes to confirm. Free up disk space To upgrade to Windows 10, you need enough space on your hard drive for the installation to take place. To view how much hard drive space is available on your computer, select the Start button, then in the search box on the taskbar, type File Explorer (known as Windows Explorer in Windows 7). Then select Computer or This PC and look under Hard Disk Drives or under Devices and drives . If there are multiple drives listed, the system drive is the drive that includes a Microsoft Windows logo above the drive icon. You’ll see the amount of available space under the drive. If it looks like your drive is running low on space, see Tips to free up drive space on your PC . 0xC1900101 Errors An error that begins with 0xC1900101 is usually a driver error. If you see any of these error codes, try the following steps first to fix the problem. If these steps don’t work, see Resolve Windows upgrade errors for more detailed technical info. 0xC1900101 - 0x2000c 0xC1900101 - 0x20017 0xC1900101 - 0x30018 0xC1900101 - 0x3000D 0xC1900101 - 0x4000D 0xC1900101 - 0x40017 Make sure that your device has enough space. Your device requires at least 16 GB of free space to upgrade a 32-bit OS, or 20 GB for a 64-bit OS. For more info, see Free up drive space in Windows . Make sure that your device has enough space. Your device requires at least 16 GB of free space to upgrade a 32-bit OS, or 20 GB for a 64-bit OS. For more info, see Free up drive space in Windows . Run Windows Update a few times. Download and install any available updates in Windows Update, including software updates, hardware updates, and some third-party drivers. Use the Windows Update Troubleshooter to fix Windows Update errors. Run Windows Update a few times. Download and install any available updates in Windows Update, including software updates, hardware updates, and some third-party drivers. Use the Windows Update Troubleshooter to fix Windows Update errors. Check third-party drivers and download any updates. You can find third-party drivers and installation instructions for any hardware you’ve added to your device on the manufacturer’s website. Check third-party drivers and download any updates. You can find third-party drivers and installation instructions for any hardware you’ve added to your device on the manufacturer’s website. Unplug extra hardware. Remove all external storage devices and drives, docks, and other hardware you might have plugged into your device that isn’t needed for basic functionality. Unplug extra hardware. Remove all external storage devices and drives, docks, and other hardware you might have plugged into your device that isn’t needed for basic functionality. Check Device Manager for errors. Select the Start button, then in the search box on the taskbar, type device manager . Choose Device Manager from the results. In the window that pops up, look for any device with a yellow exclamation mark beside it (you may have to select each category to switch to the list of devices). Press and hold (or right-click) the device name and select either Update Driver Software or Uninstall to correct the errors. Check Device Manager for errors. Select the Start button, then in the search box on the taskbar, type device manager . Choose Device Manager from the results. In the window that pops up, look for any device with a yellow exclamation mark beside it (you may have to select each category to switch to the list of devices). Press and hold (or right-click) the device name and select either Update Driver Software or Uninstall to correct the errors. Remove third-party security software. Make sure you know how to reinstall your programs and that any necessary product keys are on hand. Windows Defender will help protect your device in the meantime. Remove third-party security software. Make sure you know how to reinstall your programs and that any necessary product keys are on hand. Windows Defender will help protect your device in the meantime. Repair hard-drive errors. Select the Start button, then in the search box on the taskbar, type command prompt . Choose Command Prompt from the list of results. In the window that pops up, type chkdsk/f C: and press the Enter key. Repairs automatically start on your hard drive, and you’ll be asked to restart your device. Note You must have administrator permissions on your device to do this. Repair hard-drive errors. Select the Start button, then in the search box on the taskbar, type command prompt . Choose Command Prompt from the list of results. In the window that pops up, type chkdsk/f C: and press the Enter key. Repairs automatically start on your hard drive, and you’ll be asked to restart your device. You must have administrator permissions on your device to do this. Do a clean restart into Windows. Learn how . Do a clean restart into Windows. Learn how . Restore and repair system files. Select the Start button, then in the search box on the taskbar, type command prompt . Choose Command Prompt from the list of results. In the window that pops up, type DISM.exe /Online /Cleanup-image /Restorehealth and press the Enter key. ( Learn to repair a Windows image ) Note You must have administrator permissions on your device to do this. Restore and repair system files. Select the Start button, then in the search box on the taskbar, type command prompt . Choose Command Prompt from the list of results. In the window that pops up, type DISM.exe /Online /Cleanup-image /Restorehealth and press the Enter key. ( Learn to repair a Windows image ) You must have administrator permissions on your device to do this. Other Common Errors The following table lists the most common upgrade and installation errors and some things you can try to fix them. If you continue having problems upgrading or installing Windows 10, contact Microsoft support . Open Windows Update by swiping in from the right edge of the screen (or, if you're using a mouse, pointing to the lower-right corner of the screen and moving the mouse pointer up), select Settings > Change PC settings > Update and recovery > View your update history . Select the Start button. In the search box, type Update , and then, in the list of results, Select Windows Update > View update history . Thank you for your feedback!