Hello Raquel,
after having read your linked duscussion, I have realized, that your laptop has an Intel ICH8M SATA AHCI Controller, which is not supported by any of the actual Intel AHCI drivers.
So you have to integrate either one of the very old original Intel RST drivers, which natively do support your special AHCI Controller (e.g. RST v10.1.0.1008 WHQL) or the Intel RST driver v11.2.0.1006, which has been customized by me for being usable with all Intel AHCI systems from ICH7R/M up.
You will find the Intel RST driver v10.1.0.1008 WHQL here: http://www.win-raid.com/t2f23-Intel-R-RST-RSTe-Drivers-actual-RST-e-v-WHQL.html
The download link to the modded "Universal" Intel RST driver v11.2.0.1006 is within my guide (see the link I posted before).
Important: When you get the nLite Textmode Driver Popup, you should just check the listed "Intel(R) ICH8M-E/M SATA AHCI Controller" (v10.1.0.1008 WHQL) resp. "Intel(R) ICH8M-E/M SATA AHCI Controller (added by Fernando)" (v11.2.0.1006 mod).
Good luck!
Fernando