Issues with Flash player

Hi there,

I'm really struggling for a few days with flash player. All of this started with the now classic facebook videos issue "A flash player update is required for you to see this material" (homemade translation dunno exactly what is it in English).

I've done the last update. Hundred of times. From the link provided by facebook. From the link provided by adobe with integrated admin privilege.

I used the adobe unistall program. Re installed flash. Of course rebooted the pc several times.

I've used the unistaller from my Deleting Program Windows interface.

I went to c/win32/macromed/flash and used the unistaller from there.

Nothing worked. Still the same problem without any answer on the internet. Is the only way to format my c:// or what?

New idea in my head was to unistall by the adobe program and delete everything that is inside the macromed/flash folder.

Unfortunately I simply can't delete

activex.vch

Flash.ocx

FlashUtil_ActiveX.dll

FlashUtil_ActiveX

because I need an authorization from Trusted Installer. So I changed the authorizations from the security panel and gave all authorizations on C:// to Admin/Users/Authenticated User/ Jin (my name, and name of opened session) and nothing worked. I tried to delete them from Glary Utilities files deleter but it can't, guess why, it doesn't have the authorization from anybody that I put total control on.

I don't really now what to do next. If someone have an idea for me or even better a solution? It would be a pleasure.

Thanks for reading, sorry for my bad English, please be aware that English is not my native language.

Best regards,

Jin

e/ sorry forgot the basics

Win 10 Pro N 64 bits

Firefox 55.0.3