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The "InstallmacOS is corrupted" prompt is usually caused by security mechanisms rather than file corruption. Common reasons include unofficial download sources, incomplete files, failure to verify signatures in the old system, or misjudgment of Gatekeeper; solutions include: 1. Forced opening of the installer through terminal commands and starting the USB flash drive; 2. Temporarily closing Gatekeeper verification; 3. Remount the installer and delete kernelcache file repair permissions; ways to avoid problems include prioritizing the use of official channels to download, verify the SHA256 value, selecting a trusted third-party site, and avoiding modification of the installation content.

1. Check the activation status in the settings; 2. Use the command prompt to check the activation status; 3. Check whether there are watermarks or restrictions; 4. Verify whether the system is genuine. To confirm whether Windows is genuine and activated, first open "Settings" → "System" → "About" → "Activate" to view the status, and it is normal to display "Windows is activated"; secondly, you can run the commands wmic and slmgr with administrator permissions to view the license details; if the desktop has a "Activate Windows" watermark, it means that it is not activated; finally, use "Windows Specifications" to confirm that the system type is retail or OEM version, and use Microsoft's official tools to verify the authenticity of the system.

Connecting a second monitor when installing a Windows system will not affect the installation process, but the following things need to be paid attention to to ensure that the dual screens work normally: 1. There may be only one screen display during the installation process, and the main display device in the BIOS can be adjusted or the interface can be replaced; 2. After the installation is completed, select the display mode through Win P, and adjust the resolution, position and main display in the display settings; 3. If there is a black screen or unrecognizable situation, check the cable, update the driver or enter safe mode to reinstall the driver; 4. When using monitors with different resolutions, set the appropriate zoom ratio and enable the zoom repair option to optimize the display effect.

When booting the computer and logging in the Windows 10Logo interface is usually not damaged by hardware, but rather an error in system file loading. 1. Wait for 15 to 30 minutes first to confirm whether it is "fake death". If there is no progress, force restart; 2. Force shut down three times to enter the recovery environment, try to start repair or enter safe mode to troubleshoot driver and software conflicts; 3. Check the hard disk bad channel, clean the memory gold fingers and replace the slot to test the hardware problems; 4. Finally, you can try to reset the computer or install the system in a brand new way to solve it, and give priority to using the official website pure ISO mirror.

Before updating macOS, you should back up your Mac. 1. Use TimeMachine to make a complete backup, insert the external hard disk and enable automatic regular backup; 2. Manually back up important files to cloud storage or external devices, and give priority to backing up documents, photos, bookmarks and other key information; 3. Create a bootable macOS installation disk for system repair or reinstallation, prepare a 16GB USB disk and run terminal commands to create. Backup can effectively prevent update failure or data loss, and it is more secure to prepare in advance.

Yes, you can install and use Windows 11 without using a Microsoft account. 1. During the installation process, select "I don't have an Internet" or "Settings for Personal Use" and create a local account to skip the Microsoft account; 2. If you have installed it with a Microsoft account, you can switch to a local account in the settings; 3. You can still access all apps and system functions with a local account, but you will lose the functions of automatic synchronization between devices, cloud backup and some Microsoft store applications. Therefore, skipping Microsoft accounts is a feasible and appropriate option for users who focus on privacy or only use basics.

Making a macOS bootable installer on Windows is not officially supported, but can be implemented through third-party tools. First, prepare a USB drive above 16GB, macOS installation image (.dmg/.iso) and tools such as TransMac or balenaEtcher; secondly, use TransMac to right-click the USB drive and select "RestorewithDiskImage" to write the image, or use balenaEtcher to select ISO files and target disk to write; finally note that the USB drive must be in GPT format, and install Hackintosh, you also need to manually configure EFI boot and use boot tools to bypass restrictions.

To resolve the "Untrusted_Cert_Title" error, you must first make sure to use the official certified installer and create it correctly. Secondly, check whether the system time settings are accurate, then update the firmware and bootstrap, and finally try to install macOS through the network recovery. The specific steps are: 1. Use the official AppStore installer and create a USB installer through Apple tools such as createinstallmedia to avoid manually copying files or using third-party tools; 2. After entering recovery mode, correct the date and time through terminal commands; 3. Check and update the EFI or firmware of the Mac to confirm that the hardware supports the target macOS version; 4. Long press Option Command R to start the network