I have a 10v which dual boots OS X and Windows 7 through Chameleon bootloader. Today I was trying to install Windows 7 SP1 for which the windows partition needs to be set as active. I guess I did this incorrectly. I booted into Ubuntu off a USB drive and set the NTFS partition with a flag of "boot", and removed the "boot" flag from the small fat32 partition at the beginning of the hard drive (its about 100 or so MB, more or less, I didn't see exactly how much). When I rebooted, the computer went straight to OS X. I went back to Ubuntu and reversed the changes I made, removing the boot flag from NTFS and adding the boot flag to the fat32 partition. Now when I restart, I can see Windows 7 and OS X in the chameleon boot loader, the problem is that when I select Windows all I get is a blinking cursor.
I've tried a Windows 7 32-bit recovery USB, but after it asks for my keyboard layout (I select US), it says this System Recovery Option is not compatible with the version of Windows.