I've recently resized/moved the C partition, and then I had this problem on boot:
Windows Boot Manager
Windows failed to start. A recent hardware or software change might be the cause. To fix the problem: 1. Insert your Windows installation disc and restart your computer. 2. Choose your language settings, and then click "Next." 3. Click "repair your computer." If you don't have this disc, contact your system administrator or computer manufacturer for assistance. Status: 0xc0000225 Info: The boot selection failed because a required device is inaccessible.
I've tried to repair it with the Windows 7 installation disk, but it fails.