I know a hard disk (or ssd) may not work in dissimilar hardware, in different PCs. But I just wanted to use the disk to the new PC as a test quickly, so just replaced the disk to new desktop PC from old laptop one. And, it worked. Firstly its graphic was weird but fixed automatically in no time. Then I used the machine for a while. While that time, I use some software and Adobe after effects, and exported a video files to an external hard disk. Yes, definitely saved it. And after a while I turned off the desktop, and replaced the disk. Then, I booted the desktop with an other SSD (this is mainly used one actually) connected to the external hard disk, then I tried to check the video files I saved. And, I noticed the folder and files I created while using the laptop disk, were nowhere to be found. Seems they are disappeared. This is first time I lost some files from hard disk this clearly. Is that really possible to lose files actually saved? Does this mean the hard disk rolled back or something? What is happening? What was wrong with me? Thanks.
so just replaced the disk to new desktop PC from old laptop one. And, it worked.
Moving operating drives from one computer to another is not supported. Different BIOS, and different drivers. You really cannot switch drives between computers reliably.
So the loss of files is likely the result of the above differences.
Also, depending on the OS, activation (lack of it) on different hardware could be a problem.
You would need to recover the files from a backup or older versions.