QUOTE (maninabox @ Jun 14 2006, 12:46 PM)

Have you installed on italian windows98se?

Of course, I have the correct OS (98se italian, rel. 4.10.2222A), I also looked the message you suggested: the install order was almost the same.
I will try to install the SP on a clean windows install (only the OS with updated drivers for every hardware, without any other extra software) to see if the problem persist.
Correct me if I'm wrong, but could the problems I mentioned be related to explorer.exe? If I remember correctly that file is an essential part of the OS that controls all the things (start menu, icons, tasks) that were compromised after my recent upgrade...