My PC virtual name concern

I have a PC that I built sometime in 2015. To make a long story a little shorter, I believe Windows designated a virtual name for it. It is DESKTOP-866G***. That is not the problem. I am also running Opera browser as my main browser. When I checked my bookmarks in the Opera settings, it shows the DESKTOP-866***, but also shows another PC virtual name as DESKTOP-H466***. The confusing thing is that all of my bookmarks (and speed dial tiles, which Opera uses like bookmarks) are in this H466*** spot in Opera settings. Did Windows create this other designation? If I search in file explorer for Desktop 866***, I get some files designated as program files, but when I search for the other name (H466) I get nothing. Is there a reasonable explanation for this? Did Opera create this designation to house those bookmarks? I don't know either. The problem I am having is that I don't want to lose all of those bookmarks if and when I decide to switch to another browser (Edge, or Firefox). I have already tried to export or import them, but Opera does not play well with the other browsers. Any suggestions?

bimfi said:

I have a PC that I built sometime in 2015. To make a long story a little shorter, I believe Windows designated a virtual name for it. It is DESKTOP-866G***.

Did you ever clean install Windows again over this 6 year period?

Yes, I did a clean install to update Windows 10 to the latest version 21H1 last year or the beginning of this year. Not sure if it was a clean install, but I believe it was.

bimfi said:

Yes, I did a clean install to update Windows 10 to the latest version 21H1 last year or the beginning of this year. Not sure if it was a clean install, but I believe it was.

Each time, with a clean install, it will generate a new random Computer Name.

I don't know how Opera works but it's possible if you transferred some kind of profile between the original OS install in 2015, this 'DESKTOP-H466***' ID was the original name back then when Opera was first installed. Then, after 21H1, the Computer name was reset to this current name, 'DESKTOP-866G***', that you see system wide.