HI;
I have read the issue description carefully and in detail, and I have resolved many of these kinds of issues in my previous organizations and confident to resolve your issue with ease. You may not see any review for me on this site as I have newly started on this site, but have good reviews from other clients.
To start with please DM me with answers to the below questions to understand the situation better.
1. Is the computer connected to Domain/server network?
2. Are you trying to access user folder from another computer using Network or Remote Desktop?
I see that you are facing issues regarding files and folders. This might be due to the corruption of attributes of files or folders.