There are different P300 versions.
Click on the link below:Fujitsu Siemens Download page.
( http://ts.fujitsu.com/support/downloads.html )
In the page put scenic p300, or put the serial, or put scenic p300 in model description.
In the following boxes select:
Select model in last box
In the next step you will be asked to select Windows operative system.
Select OS, then find the driver to download.