Windows?
I still have my PC, which I've been using for three years, but I'm about to get a nearly completely new one. I'll install the SSD in the new PC, but I'll replace everything else. Will Windows be stored on the SSD? And will I have it if I connect the SSD to the new one?
For some of you this question might sound stupid but I have absolutely no idea about software
Hello
As you imagine, it doesn't always work. If you insert the hard drive from another PC into a new one, or connect it to another motherboard, then an existing Windows installation has to start the new hardware. This is not guaranteed, but possible.
If an existing Windows installation on a new motherboard does not start or starts at all. again and again only the BIOS is opened, then it could be because the Windows was installed on an MBR disk and the BIOS of the motherboard is set to UEFI boot. In UFEI boot mode, however, only GPT disks can be started. Launching MBR disks only goes in Legacy Boot mode. For this, the CSM must be activated in the BIOS/UEFI if the BIOS/UEFI still offers it. Then Windows should be able to start from an MBR disk.
If Windows should start again on the new motherboard, it also has to drive up completely without errors. If it doesn't, you won't get around a new installation.
But even when Windows is running up, it is disabled because the activation of the installed Windows was only related to the mainboard where the Windows license was activated. With this motherboard, the Windows license, on the Microsoft activation servers, is still linked.
Therefore, the new owner of your old motherboard will also be happy if you want to share it if an activated Windows license is linked to the old motherboard, because it only needs to be Windows 10/11, provided the correct Edition Home or Pro, and Windows will be activated with your old Windows license. You then pass the license with the motherboard. If you don't want to do this, you should pay attention to the following.
To enable Windows on the new motherboard, you need the original license key. Reading the same usually does not help anymore, as when a Windows 10/11 license is first activated, it is converted into a digital license and linked to information of the motherboard. This information has been stored on the Microsoft activation servers and is used to automatically activate Windows 10/11, after a new installation, on the same motherboard. When converting into a digital license, however, only one generic key is stored in the Windows Registry, as a placeholder that can be read out, but which is not valid for a renewed activation. Either you have the original license key or you need to link the old activation to a Microsoft account. You can also change the license to new hardware. But even if you use a Microsoft account, you need the digital license manual link to the Microsoft account that does not happen automatically, only by using a Microsoft account, except that the Microsoft account was also used for the first time activating the license.
https://support.microsoft.com/de-de/windows/windows-activate-c39005d4-95ee-b91e-b399-2820fda32227
https://support.microsoft.com/de-de/windows/reactivate-von-windows-10-nach%C3%A4change-der-hardware-2c0e962a-f04c-145b-6ead-fb3fc72b6665#ID0EBD=Windows_10
That's what's described again. Otherwise you need a new Windows license.
As a result, the Windows license is invalid for the old PC or the old motherboard, as this license can always be used only on a single PC at the same time. The license may continue from PC to PC, only at the same time it may only be activated and used on a computer.
Additional reference for the CSM or Legacy Boot Mode:
In Legacy Mode (CSM), Secure Boot is not active, so you can't upgrade to Windows 11. For this, the UEFI boot mode must be used, so without CSM and then the partitioning of the boot data carrier must be changed from MBR to GPT. But you need to reinstall Windows completely, in (U)EFI mode. Attention, all data on the target disk are lost or deleted. So back up data! Then boot the computer with a Windows installation medium in (U)EFI mode, so disable CSM. Starting the setup from the desktop is not enough in the case. This would only use the upgrade function of Windows. However, you need to reinstall Windows completely and re-particulate the hard disk so that it is switched to GPT and this is only done with a complete reinstall. Then, during the Windows setup, Delete all partitions on which disk you want to install Windows and then rebuild the partitions. The GPT is automatically used when the Windows Setup has been booted in (U)EFI mode. Then you can install Windows in (U)EFI mode with active Secure Boot.
There is still the possibility to convert the data carrier into operation:
https://docs.microsoft.com/de-de/windows-server/storage/disk management/change-an-mbr-disk-into-a-gpt-disk
https://docs.microsoft.com/de-de/windows/deployment/mbr-to-gpt
After conversion, the system is no longer bootable in legacy mode, only in (U)EFI mode. Therefore, after conversion, the BIOS/UEFI from Legacy (CSM) has to be converted to (U)EFI boot so that the computer starts again. However, during the conversion nothing should go wrong, otherwise it was with the data and installed programs. So always secure data!
mfG computer tomb
@computertom has explained this very well and in detail.
My simple answer is…
Let it be and install Window NEW.
Saves a lot of trouble.