Solution 1:

The folder named "found.000" is from chkdsk, it puts these folders and files inside the folder when it finds corrupted fragments on the partition, instead of deleting them it puts them here.

Windows lists .CHK files as “recovered file fragments”. A single .CHK file can actually contain one or more complete files, fragments of a single file, or fragments of many files. unfortunately you usually won’t be able to recover much data from .CHK files.

The reason you are even seeing it is because you have "show hidden files" enabled in windows explorer. They usually aren't visable to the user.

Try manually deleting them from the command prompt with administrator privileges. Or you could just leave them, if the are small sized it isn't going to mess with anything.

If you keep on seeing new files created here, it could be a sign your hdd is starting to fail. It wouldn't be a bad idea to check it's smart status.

Solution 2:

I've done this in Windows 10: open Command Prompt as administrator, then run this:

takeown /r /d y /f folder.000

to take ownership of the folder, and then:

icacls found.000 /reset /t

to reset the folder security to match the parent. Once reset you can open the folder using windows explorer or delete it like normal folders.

I had a lot of found folders, found.000 to found.082, so to change them all at once, I ran dir found.* /a /b to get the list of found folders, then using text editor I changed each line to be like above, then copy paste the whole thing to command prompt.