Hi Shauna,
What is the exact and complete error message you get?
Go into BIOS and change the Drive Boot Order so that the Hard Drive comes first as a boot priority. You should be able to boot into Windows normally after you save it to that configuration.
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.
For help with the BIOS settings, refer to the computer manual or contact the manufacturer.