Hello, I'm French (sorry for my English), and i have a big mistake with my Macbook Pro 13 from Mid 2010. This is a used item, and the internal HDD cable was broken, and the Hard drive was not detected. I have buy a new one (third party i think), a WD Scorpio Black hdd and 4gb memory. - I can install Snow Leopard 10.6.3 from an original disk, and it's working perfectly, no freeze, no kernel panic, etc... - But if i try to update in 10.6.4, .6, .7 or .8, at the reboot the mac freeze on the apple logo after 4 or 5 circle turn. I have to re install from the CD... - Windows installation are not working, in seven, vista, 8 or XP, i have freeze... I have try to: - Reset SMC -> same - Change HDD and Memory -> same - Install in external HDD 10.6.3 and update -> same - Same even if i download the combo update EFI mistake? I have the BOB version but i can't update because it says i have to run OSX 10.7... Please help, 3 french forum and US apple community can't solve my problem... thanks!!!