Ok I finally put back the cart with the origin HDD 750Gb + install WIN10 on it. Now exept REBOOT and SHUTDOWN it run pretty fast. (Adobe illustrator 2019 "alomost" fly on it!) [NAME] Thanks for suggestion but as I told I install Ubuntu on it (just to test) Start Reboot and Shutdown it all good. The problem is like more Windows and this laptop (Bios....).  Its about a bit more 4-5min to wait. And I am sure my friends will easily compose with it. 
Hello,  For friends I try to update the very old vostro 3450 : 1- I replace 4Gb RAM with new 8Gb RAM2- I replace old 750Gb HDD by a SSD 128Gb (port Sata1)3- I replace DVD player by cart with the old 750Gb HDD inside (port Sata2 optical)4- I replace mainboard battery5- I replace the laptop battery6- I upgrade from BIOS A07 to A137- Last I install clean Windows 8.1 (all devices are recognize) Now if I boot (1st boot) it goes very fast. Everything is very smooth. The problem comes if I reboot or I shutdown the laptop : It take more than 10min with blank screen (you don't see anything on it except that you know that the laptop is still ON). Why??..... :(( I try this : I remove the cart with the old 750Gb HDD inside (port Sata2 optical) and it become normal again. Start fast, reboot and shutdown fast. Someone understand this please ?? I really need to use the cart with the old 750Gb HDD inside (port Sata2 optical) for this laptop.
VOSTRO 3450 Upgrade (RAM+SSD) fail