ubuntu wont boot after installing windows 8

view story

http://askubuntu.com – ubuntu wont boot up after I installed Windows 8. get this error Windows Failed to start. " A recent hardware or software change might be the cause. To fix the problem: Insert your windows installation disc and restart your computer. Choose your language settings, and then click "next." Click "Repair your computer." If you do not have this disc, contact your system administrator or computer manufacturer for assistance. File: \ubuntu\winboot\wubildr.mbr status: 0xc000000f (HowTos)