Okay! For anyone who has this issue, here's a possible workaround:
Go to settings->personalization->Compositions (themes)->themes settings and change theme from "Windows" to "Windows 10".
It works for some of people just enough. In Win8 you'll probably need just to change the theme to default.
In case it won't work for you, here's a effortless solution:
Open notepad. Paste this:
Windows Registry Editor Version 5.00
[-HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Explorer\FolderDescriptions{2112AB0A-C86A-4ffe-A368-0DE96E47012E}]
[-HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Explorer\FolderDescriptions{491E922F-5643-4af4-A7EB-4E7A138D8174}]
[-HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Explorer\FolderDescriptions{7b0db17d-9cd2-4a93-9733-46cc89022e7c}]
[-HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Explorer\FolderDescriptions{A302545D-DEFF-464b-ABE8-61C8648D939B}]
[-HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Explorer\FolderDescriptions{A990AE9F-A03B-4e80-94BC-9912D7504104}]
Save as "All Files (*.*)" and put the name Folder.reg. Destination does not matter. Copy it to your C: (just root of C:, so path will be C:\Folder.reg). You'll need the administrator rights.
Open notepad again and paste this:
regedit /s "C:\Folder.reg"
Save as "All Files (*.*)" and put the name folder.bat. Destination does not matter. Copy it to your C: (just like above, root path, so it will be C:\folder.bat). You'll need, of course, administrator rights.
As you have these two files in C:, the tricky part comes. Hit Winkey+R, enter
regedit. Go to HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run. Right-click (mouse) on the right side and choose
New->String Value (REG_SZ). Name it as you want it to be presented in the Taskmgr "startup" section. Double click this value and enter in the box
"C:\folder.bat"
Click "OK", so the value will be saved. Close the regedit.
First time to solve a problem, you could manually click the C:\Folder.reg file and click "Yes" when it ask you if you want to insert these changes to the registry.
If everything went OK, created .REG file will be applied every time you log in to your Windows account. So, probably, you won't need to apply these registry changes manually again. I know it's just a workaround, but at least works fine for me.
In Windows 10 changes are immediate, no reboot needed. I know this solution could possibly work for Win 8 and 8.1.
I was pissed off of all these "can't change folder name. Path doesn't exist" so I managed to get rid of it.