First off sorry for posting my issue in the English forums because my retail copy of the game is in Italian language.
I firstly bought the game on GoG, tried to apply a translation patch but it didn't worked because the patch was for retail copy of the game, so I bought the discs at eBay at good price in my own language.
The installation process was fine and I rebooted my PC after reboot request. After the reboot and launching the game, it want again to reboot the PC.
I googled on the Internet for a solution and then I found that v1.49 patch removes starforce which is surely the cause of endless reboot (my PC runs on Windows 7 x64)
I downloaded the patch v1.49 english because there wasn't other language options. I though "well let's install the english patch and then install the italian patch as described in the first rows above". I got the message "This is not the good game version". I tried to download and install early patches versions and I got the same message. Boring.

So the question is: How can I stop the endless reboot request? I want to play the game in my own language because I was so amused when I played Divine Divinity and Divinity 2 - Ego Draconis

Thanks in advance.