I tried that before, but unlike most people claiming suddenly everything is ok, at my side it isn't.
It's the first time I tried it out with the option on the drivers signature though, but this didn't help either.
- When I try an update driver software, selecting the inf file of the ch341ser.zip I get a message it is not compatible.
- When I run the setup.exe, then run "install" it ends up saying "The device is successfully pre-installed in advance" as if it installs a driver but hasn't found any hardware yet.
So no luck so far.