Restore Win 7 MBR without Recovery/Install Disc
This is how to restore Windows 7 MBR (relies on CD Drive).
But I need to do this with a netbook, how do I restore the MBR via USB?
The actual problem is this
You will need access to a system that has a DVD burner to start.
Have not had to try this procedure myself, but give this a try and let us know what happens.
If all else fails, and you're sure it's the MBR, you can use Testdisk to write a new MBR to the drive.
The Testdisk MBR is not the same a a standard MBR, but it should allow you to boot from any partition whose boot sector is valid.
Testdisk can also repair damaged partition tables, boot sectors, and other volume structures.
Testdisk can be run from a Live Linux CD/USB.