Hello again, I have tried some things with no luck. At first, I renamed the folder with Greek name in English ( in Windows 10 pc) and checked in Windows ME. The folder was accessible but whatever Greek named appear in there was still with weird characters. I scandisk the usb drive and opened properties tab. You can see in the picture bellow (with circle an example of file which appears in gibberish. Also scandisk messed with the USB files, I lost some pdf and some Greek notepad files weren`t accessible even in windows 10.
I tried also to install Office 2000 pro in Greek, hoping this may somehow fix the problem. After a lot of guessing (Gibberish in many windows) it installed successfully and inside office I have Greek appearing ok and also writing. But in general, the problem persists. I cannot even write in Greek in windows like name a folder or a file in Greek. I checked all possible keyboard settings as you can see in next picture with no luck.
I don`t know what else to try, I think it`s a font/script issue, the system doesn`t set the font script in Greek and keeping it in western. All Greek fonts are present and working, checked and write successfully in notepad by selecting a font with Greek script.
I am open to suggestion!