Installed dual boot Ubuntu 14.04 and Windows 8.1 Can't boot into Windows
How far can you get into your recovery disc? If you can enter CMD, you can follow this guide. This will reinstall the Windows 8 boot loader onto your primary hard drive's MBR.
Usually I'd include the steps upon posting, but the post is too long. Let me know how you get on, or how far you get, and if a success, I will rewrite the instructions into this post.