Why won't windows 10 boot from ssd on laptop?

Question

Windows

Hello, the problem is this:
I recently returned home from St. Petersburg after a long absence, my hands were itching to start the old PC. I cleaned it all, changed the thermal paste and GPU, and CPU. Launched, everything is wonderful. Hdd hitachi is there, well, without hesitation, I decided to throw an ssd from an everyday laptop to it to transfer information, removed it from a working laptop, like I have it semi-disassembled. Everything is fine, everything works, after which I put it back on the laptop (it did not turn off, but if I'm not mistaken it was in sleep mode). After that, the laptop did not reboot, downloaded something from the torrent, did not unpack it, decided to reboot because the desktop turned black and the icons on the taskbar turned white. I rebooted everything (and everything is already, everything)), in general, the Windows icon is loaded, then a stupidly black screen and the download spins. I decided to put it back in the PC, where it is now unavailable, or rather, how the PC sees it, but you can't log in (error: "access denied"). I tried to restore the bootloader, all in vain, everywhere it denies access. Naturally tried to do it on the laptop. What could be the problem guys?
By the way, if I change sata mode c achi to ide in the BIOS, then when Windows starts, a blue screen appears with the error INACCESSIBLE_BOOT_DEVICE

Answer 1

Judging by the description, a large PC has corrupted / overwritten the gpt entry on your ssd (this is the former mbr).
I would try to boot from the Windows installation disk and restore the system.