Recently I have used Bootcamp to install Windows 7 Professional (64bit) on my Mac Book Air 3,2. I didn't have a CD/DVD so I used ISO and USB.
This is how I did it:
- Use VirtualBox to install the Windows ISO
- Use the Virtual Windows to copy the ISO contents onto a 8GB USB and its boot information. (bootsect.exe) (Guide here)
- Use Daemon Tools to trick BootCamp 5.0 to partition the disk.
- Install rEFIt and used it to boot into the Windows Installation USB that I created earlier using VirtualBox.
- Install Windows, then manually install all Apple BootCamp Support Drivers.
Then, I realized that I had given too little space to Windows. So, I did this:
- Shrink the Mac partition.
- Boot into Windows 7.
- Use Windows 7 to expand the partition to take up the unallocated space.
Now, Windows crashes on startup with the error that it can't find a bootable device. So, I used rEFIt's Partitioning Tool to repair the MBR.
So far, so good. Then comes the problem.
When booting, Boot Manager crashed with
status code 0xc0000225 and it told me to use the installation disc to repair the computer (as said so in an online guide, too [I can't find it, sorry])
I inserted the USB that I created earlier with VirtualBox containing the ISO contents and the boot information and restarted the Mac and into rEFIt.
I selected boot Partition 1 (which is Partition 1 for the USB, /dev/disk1) but instead of booting into the Installation, it booted into my internal Windows OS (which crashes, of course, because its the screwed up installation)
So now I can't boot into the Installation USB (selecting the USB or Windows boots into the same thing) and I need to do it to repair the system!
How should I boot into the USB?
Thanks in advance!
I have tried using the Windows USB tool, however it still dosen't work.
Tried using rEFIne, also couldn't work. Now trying CD (if I can get one) and editing BIOS values.