I am trying to do a restore on my laptop but when i try to install windows 7 it ask for the driver files. (To install the device driver needed to access your hard drive, insert the installation media containing the driver files and then click okay.) My laptop came with the restore disk but it worked only the first time i had to do a restore. 2nd time i had my mother download a driver on to her flash drive and it worked but recently she lost the flash drive and now we can't find the same driver that worked before. If anyone knows what driver i need please help, Thank you.

My Laptop is a Dell XPS 15 L502X