I am running Win 7 Ult. 64 bit. I installed win 8 Enterprise on another partition. Unfortunately it did not create a boot menu. I installed Easy BCD 2.2 and created a boot menu for Win 7 and Win 8. Now Win 8 will not boot, gives a message that unsigned file is corrupted or not digitally signed. Names winload.exe as offending file. I set boot to run unsigned drivers in Easy BCD for win 8 but that did not fix it. Message states to insert DVD and use Repair your computer to fix it. If I do that with the Win 8 DVD will it screw up my Win 7 installation or not be able to boot into Win 7 by repairing with the Win 8 dvd. I am only trying Win 8 to see what it's like and do not want to mess up Win 7. Thanks for any help.