SSD installed. A little tip for other users, I had no time to spend for a brand new installation of Windows 7 (the ssd is giving new life to an old asus laptop) so I cloned the old hard drive with Macrium Reflect free (google for it, I'm not allowed to link external urls) and in half an hour I completed the task.
TRIM function activated by Sandisk Ssd dashboard and AHCI actived entering in the bios setup control.
Everything works fine.
Product registered on SSD product for the 3 year warranty, the last thing to do is to enjoy the speed enhancement
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I hope my feedback will help.
Thanks for support.
P.s. I spent 45 bucks on the amazon