Fixes an issue in the Cdboot.efi, Cdboot_noprompt.efi, Efisys.bin, and Efisys_noprompt.bin files that causes a "Boot failed" error message. This issue occurs when you start a UEFI-enabled computer from the installation DVD of a 64-bit version of Windows 7 or Windows Server 2008 R2.

Find your error code. If you’ve received an error code, we have solutions that can help you to resolve your issue. Just browse for your code in the list below. For additional PC help, go to: Troubleshoot issues with the Xbox app for Windows. For additional console help, go to: Troubleshoot game issues on Xbox. Error codes. Collapse all. Xbox 360.

If your system is asking you for your BitLocker recovery key, the following information may help you locate your recovery key and understand why you're being asked to provide it. Important: Microsoft support is unable to provide, or recreate, a lost BitLocker recovery key.

Workaround for error code 0x800705aa, error code 0x8007007e, and error code 0x80004005. To work around this problem, replace the Dpcdll.dll file by using a clean Dpcdll.dll file that has the correct version. Note To obtain the clean Dpcdll.dll file, copy the Dpcdll.dll file from a new installed computer.

You can bring up the Xbox Startup Troubleshooter on this console by holding only the Pair button and then pressing the Xbox button . Continue holding the Pair button and Eject button for 10-15 seconds. Listen for two “power-up” tones a couple of seconds apart.

You see the following error code when you try to launch a game on a Windows 10/11 device: 0xc0ea0001. This can mean that there’s a potential service outage or an issue with the license manager on your device.

If some Windows functions aren't working or Windows crashes, use the System File Checker to scan Windows and restore your files. Though the steps below might look complicated at first glance, just follow them in order, step-by-step, and we’ll try to get you back on track.

An attacker who successfully exploited the vulnerability might bypass secure boot and load untrusted software. This security update addresses the vulnerability by adding the signatures of the known vulnerable UEFI modules to the DBX. To learn more about this security vulnerability, see the following advisory:

PC Health Check app brings you up to date info on your Windows device health, helping you take action to improve your device performance and troubleshoot performance problems. It is periodically updated based on customer feedback to help you make the most of your Windows PC. How to open PC Health Check. In Windows, use Search on the taskbar to ...

Find the Recycle Bin. If your desktop shows no icons at all, right-click (or press and hold) the desktop and select View. If Show desktop icons has no checkmark, click it to add one. If that doesn't work, try this: Select Start > Settings > Personalization > Themes > Desktop icon settings.