I am about to go home for Christmas and my brother's computer (which I built) now fails to boot. with the message: 'Windows failed to start. A recent hardware or software change might be the cause. To fix the problem: 1. Insert you windows installation disc and restart your computer. 2. Choose you language settings, and then click "Next." 3. Click "Repair your computer." If you do not have this disc, contact your system administrator or computer manufacturer for assistance. File: \EFI\Microsoft\Boot\BCD Status: 0xc000000f Info: An error occurred while attempting to read the boot configuration data.' Apart from doing an OS repair or reinstall is there anything else I should be aware of with regards as to what might have caused the fault in the first place?