I'm having a similar problem... VAIO SVS13A190S, put it a new SSD and fresh installed Windows 7 Pro, and I have to tap F11 to get it to load, otherwise it says "operating system not found". It's recognized in BIOS, and in device manager. Up to date firmware. I'm really not sure what to do. I reformatted and installed Ubuntu no problem. Installed Windows 7 again and same problem. Any ideas?
I'm having the same problem with a Vaio SVS131190X and Windows 8. Did you guys find a solution?