Having this issue where folder I create sometimes become hidden folders and others going hidden AND made into system folders.

Using cmd.exe and the attrib command does not appear to work as expected.

So for example if my hidden folder is d:\mydir\myhiddendir

attrib -S -H d:\mydir /S /D

This does not work

What I found did work was this:

Set-Location D:\mydir

Get-ChildItem -Attributes Hidden | Foreach-Object { $_.Attributes = 'Normal' }