How to resolve system conflict?

Question

System administration

Good afternoon!
Please help me in this matter.
There was a computer with windows xp installed. I added a hard disk to the hardware, installed windows 7 on it. Everything started fine, 2 disks work. Directly deleted all unnecessary files from the old disk, leaving only the desktop folder (with xp).
It contains important files that simply cannot be read, written, copied. Writes no rights!
What I did:
- through the local security policy, removed all groups and users besides the main one from win7
- shared access to this entire folder
- gave the group the desired access level
- disabled the rest of the nodes
- tried to copy it via total commander to disk 2
Nothing helps, I understand that the conflict of two different systems. What else can be done?

Answer 1

Replace the owner of the folder and everything inside through Properties - Security - Advanced - Owner (and the checkbox "Replace all permission entries of a child object")

Answer 2

Try Unlocker .