Hi there, sorry for the delay
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So, I really want to thanks everyone of you for your help and very quick replies. This forum looks very active filled with very nice/competent people. I'm already adicted.
Unfortunately, it looks like the computer doesn't work properly, when I press any of the keys (tapping few times F1 or 1 at boot, nothing is happening, can't go to the SMS Menu). And at the end of the boot, the computer is frozen (the keyboard doesn't respond).
Also, the friend who gave me the computer doesn't have any floppy disk or media installation disk.
So, I think I'll just give up with that computer
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Thanks again for your help.
ps : sorry for my bad English (this is not my native language).