I will answer -
It was very careless to delete the Windows.old folder on the accountant’s computer during the cleaning process. Who knew that there was 1C installed :("

No removal on the computer accountant, fucking! Remember this all "sysadmin", "Aichi engineers" and other "children programmers"!

The second is either a full backup, or we remove the old winchester with the data, put a new one and copy the data from the old one. And in general, we treat the computer as if it was a mine of time.
Because it’s a computer accountant, fucking!