Windows USB Serial driver .INF

[Hp50gFr]

Hi, Could it be possible to have this .inf again?
or do i miss something when i read "bastarized driver. That said, the driver itself is from Microsoft, I'm just supplying the VID and PID of the calculator to tell Windows it's okay to install the usbser.sys driver for this device. What's unfortunate is if HP had the calculator saying it was Class 02 they'd not even had to write drivers at all..."
?
I want to have only a serial over usb access and use it with some tcl/tk programms
Thanks