I am having a strange dual-boot issue that I haven't been able to find an answer for anywhere. I have an Ubuntu 14.04 box, which I have created a secondary partition on for Win7. My setup process:
- Boot to Ubuntu USB drive trial, shrink the Ubuntu partition and create NTFS partition, restart
- Boot to Win7 CD, install, reboot, log into Win7 fine, restart
- Boot to Ubuntu USB drive trial, run Boot-Repair, restart
Now I get a Grub menu on startup, and can get into Ubuntu no problem. However, trying to access Win7 results in a blank 'purple' screen (color of Grub screen), although I can hear the 'startup music' of Windows 7.
If I boot off the Windows CD again, and run "bootrec /fixboot" from the command line, then I am able to reboot, choose Win7 in Grub, and get into it correctly. HOWEVER, if at any point I go back into Ubuntu, then afterwards I run into the same problem above when trying to access Win7 unless I repeat the CD boot/bootrec step first.
Any ideas as to why accessing my Ubuntu partition keeps rendering my Win7 partition non-accessible?
FURTHER INFO: I tested, and it is not the selection to boot from Ubuntu that causes the subsequent Windows boot to fail. If I do two back-to-back Windows boots, the one after the CD boot/bootrec works (via a "Boot to safe mode or normally" menu), and then the next one fails.