File Disappeared From Folder

A strange thing happened today with a file I downloaded. I don't know if this belongs here or in the networking forum, but I'll try to provide as much detail as possible.

I work with a Windows 10 computer that is part of a network. There is a 'shared drive' which all of the computers have access to. However, my computer's C:\ Drive and its folders (Desktop, Documents, Downloads, etc.) all say "Not Shared" when I check the networking tab in properties.

Based on this, I assume that my C:\ Drive isn't accessible by other computers, unless someone remote accesses it with an Administrator account. Please correct me if I'm wrong about this.

Today I downloaded a file to my Downloads folder and tried to rename it. For some reason this wasn't possible. The mouse pointer would turn into a spinning blue circle showing that it was working on renaming the file, but it couldn't seem to complete the task. File Explorer would also say "not responding".

Since File Explorer seemed to be stuck, I closed it down, but this would cause it to crash. I tried this twice today with the exact same result; File Explorer would close, and the taskbar would disappear for a few seconds before reappearing.

I didn't know what was wrong with the file. Scanning it with Windows Defender came back with clean results, but I didn't want to risk opening it. I decided to save over the file and see if it behaved any different after overwriting.

Using Google Chrome I downloaded a different file using the same name so it would replace the original. It took a long time and eventually it got stuck at "0 bytes" remaining.

In the Downloads folder, I could still see the original file and another file with a numbered file name that looked like a blank page. I'm assuming the second file was the incomplete download in progress.

I went back to Chrome and canceled the frozen download. When I returned to the Downloads folder, the file was gone!

Since I canceled the download, I didn't think the original would just vanish like that. I moved the mouse pointer to the Undo button to see if I can reverse it, but all the mouse rollover showed was my attempt to rename the file. I tried clicking it just in case it might bring back the file, but a pop-up appeared saying that the file cannot be found.

So here are my questions:

1) What was preventing me from renaming this particular file in the first place?

I never opened the file. I even tested renaming other files in the same folder and they were all renamed without any problems.

2) Did my computer delete the file on its own, or is it hidden somewhere?

I tried using search, but wasn't able to find it.

3) Could someone have been trying to move the file out of my drive at the same time or was viewing it?

This is what I'm worried about, but I don't know if it's even possible. The drive and folder the file was in, isn't shared. Also, would Chrome have allowed me to attempt overwriting a file that was in the process of being moved or was already opened?

4) If the file really was opened or being moved by another user, would there at least have been some warning or sign that the file was currently in use?

Any help / advice you can provide would be appreciated.

Thanks,

Unlucky_Pete

EDIT: Corrected a spelling error.