Hello Katherinquiroz,
a. Boot into the Windows 8 disc.
Once selecting your language, time and keyboard settings, click Next to load the next window, then click on the Repair your computer link on the bottom left corner of the window.
You should then be presented with a Choose an Option screen, with Troubleshoot as an option to select.
In the Troubleshoot screen, select advanced options.
Select Automatic Repair from the advanced options screen and then select the target operating system to repair, which would be Windows 8 in this case.
Method 2: If automatic repair doesn’t work please perform system restore, please restore the computer to the date when the computer was working fine using a disc.
a. Boot into the Windows 8 disc.
b. Refer to the section Method 3 under Windows 8 in the following link.
http
/support.microsoft.com/kb/2700567#method4
Method 3: Please check if the hard disk is detected in Basic Input/Output System (BIOS).
Please contact the computer manufacturer for BIOS settings.
Note:
Modifying BIOS/ complementary metal oxide semiconductor (CMOS) settings incorrectly can cause serious problems that may prevent your computer from booting properly. Microsoft cannot guarantee that any problems resulting from the configuring of BIOS/CMOS settings can be solved. Modifications of the settings are at your own risk.
If this dosent works then tell me
Regards & Enjoy 
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